Home / 28,356.62-39,132.16-15,781.10

Finding the Fourth Proportional to 28,356.62, 39,132.16 and 15,781.10

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Solution

The fourth proportional to 28,356.62, 39,132.16 and 15,781.10 is: 21,777.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,356.62 : 39,132.16 = 15,781.10 : x
  2. Step 2: Convert to fraction form
    28,356.62/39,132.16 = 15,781.10/x
  3. Step 3: Cross multiply
    28,356.62x = 39,132.16 × 15,781.10
  4. Step 4: Simplify right side
    28,356.62x = 617,548,530.18
  5. Step 5: Solve for x
    x = 617,548,530.18/28,356.62
  6. Step 6: Final answer
    x = 21,777.93

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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.