Home / 13,221.53-18,245.58-7,253.19

Finding the Fourth Proportional to 13,221.53, 18,245.58 and 7,253.19

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Solution

The fourth proportional to 13,221.53, 18,245.58 and 7,253.19 is: 10,009.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.53 : 18,245.58 = 7,253.19 : x
  2. Step 2: Convert to fraction form
    13,221.53/18,245.58 = 7,253.19/x
  3. Step 3: Cross multiply
    13,221.53x = 18,245.58 × 7,253.19
  4. Step 4: Simplify right side
    13,221.53x = 132,338,658.40
  5. Step 5: Solve for x
    x = 132,338,658.40/13,221.53
  6. Step 6: Final answer
    x = 10,009.33

Related Problems

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Half scale
Find fourth proportional to 26,443.05, 36,491.16 and 14,506.38
Double scale
Find fourth proportional to 13,222.53, 18,246.96 and 7,254.19
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.