Home / 15,459.89-21,318.93-13,229.15

Finding the Fourth Proportional to 15,459.89, 21,318.93 and 13,229.15

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Solution

The fourth proportional to 15,459.89, 21,318.93 and 13,229.15 is: 18,242.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,459.89 : 21,318.93 = 13,229.15 : x
  2. Step 2: Convert to fraction form
    15,459.89/21,318.93 = 13,229.15/x
  3. Step 3: Cross multiply
    15,459.89x = 21,318.93 × 13,229.15
  4. Step 4: Simplify right side
    15,459.89x = 282,031,322.81
  5. Step 5: Solve for x
    x = 282,031,322.81/15,459.89
  6. Step 6: Final answer
    x = 18,242.78

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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.