Home / 28,490.25-39,316.56-15,915

Finding the Fourth Proportional to 28,490.25, 39,316.56 and 15,915

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Solution

The fourth proportional to 28,490.25, 39,316.56 and 15,915 is: 21,962.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.25 : 39,316.56 = 15,915 : x
  2. Step 2: Convert to fraction form
    28,490.25/39,316.56 = 15,915/x
  3. Step 3: Cross multiply
    28,490.25x = 39,316.56 × 15,915
  4. Step 4: Simplify right side
    28,490.25x = 625,723,052.40
  5. Step 5: Solve for x
    x = 625,723,052.40/28,490.25
  6. Step 6: Final answer
    x = 21,962.71

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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.