Home / 13,212.18-18,232.80-7,243.72

Finding the Fourth Proportional to 13,212.18, 18,232.80 and 7,243.72

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Solution

The fourth proportional to 13,212.18, 18,232.80 and 7,243.72 is: 9,996.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,212.18 : 18,232.80 = 7,243.72 : x
  2. Step 2: Convert to fraction form
    13,212.18/18,232.80 = 7,243.72/x
  3. Step 3: Cross multiply
    13,212.18x = 18,232.80 × 7,243.72
  4. Step 4: Simplify right side
    13,212.18x = 132,073,225.27
  5. Step 5: Solve for x
    x = 132,073,225.27/13,212.18
  6. Step 6: Final answer
    x = 9,996.32

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Double scale
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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.