Home / 13,220.96-18,240.18-7,551.62

Finding the Fourth Proportional to 13,220.96, 18,240.18 and 7,551.62

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Solution

The fourth proportional to 13,220.96, 18,240.18 and 7,551.62 is: 10,418.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.96 : 18,240.18 = 7,551.62 : x
  2. Step 2: Convert to fraction form
    13,220.96/18,240.18 = 7,551.62/x
  3. Step 3: Cross multiply
    13,220.96x = 18,240.18 × 7,551.62
  4. Step 4: Simplify right side
    13,220.96x = 137,742,908.09
  5. Step 5: Solve for x
    x = 137,742,908.09/13,220.96
  6. Step 6: Final answer
    x = 10,418.53

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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.