Home / 28,781.14-39,720.88-16,036.40

Finding the Fourth Proportional to 28,781.14, 39,720.88 and 16,036.40

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Solution

The fourth proportional to 28,781.14, 39,720.88 and 16,036.40 is: 22,131.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,781.14 : 39,720.88 = 16,036.40 : x
  2. Step 2: Convert to fraction form
    28,781.14/39,720.88 = 16,036.40/x
  3. Step 3: Cross multiply
    28,781.14x = 39,720.88 × 16,036.40
  4. Step 4: Simplify right side
    28,781.14x = 636,979,681.34
  5. Step 5: Solve for x
    x = 636,979,681.34/28,781.14
  6. Step 6: Final answer
    x = 22,131.85

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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.