Home / 28,515-39,349.98-15,939.84

Finding the Fourth Proportional to 28,515, 39,349.98 and 15,939.84

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Solution

The fourth proportional to 28,515, 39,349.98 and 15,939.84 is: 21,996.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515 : 39,349.98 = 15,939.84 : x
  2. Step 2: Convert to fraction form
    28,515/39,349.98 = 15,939.84/x
  3. Step 3: Cross multiply
    28,515x = 39,349.98 × 15,939.84
  4. Step 4: Simplify right side
    28,515x = 627,232,385.20
  5. Step 5: Solve for x
    x = 627,232,385.20/28,515
  6. Step 6: Final answer
    x = 21,996.58

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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.