Home / 15,459.90-21,318.92-13,229.16

Finding the Fourth Proportional to 15,459.90, 21,318.92 and 13,229.16

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Solution

The fourth proportional to 15,459.90, 21,318.92 and 13,229.16 is: 18,242.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,459.90 : 21,318.92 = 13,229.16 : x
  2. Step 2: Convert to fraction form
    15,459.90/21,318.92 = 13,229.16/x
  3. Step 3: Cross multiply
    15,459.90x = 21,318.92 × 13,229.16
  4. Step 4: Simplify right side
    15,459.90x = 282,031,403.71
  5. Step 5: Solve for x
    x = 282,031,403.71/15,459.90
  6. Step 6: Final answer
    x = 18,242.77

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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.