Home / 28,387.83-39,176.97-15,812.58

Finding the Fourth Proportional to 28,387.83, 39,176.97 and 15,812.58

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Solution

The fourth proportional to 28,387.83, 39,176.97 and 15,812.58 is: 21,822.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,387.83 : 39,176.97 = 15,812.58 : x
  2. Step 2: Convert to fraction form
    28,387.83/39,176.97 = 15,812.58/x
  3. Step 3: Cross multiply
    28,387.83x = 39,176.97 × 15,812.58
  4. Step 4: Simplify right side
    28,387.83x = 619,488,972.28
  5. Step 5: Solve for x
    x = 619,488,972.28/28,387.83
  6. Step 6: Final answer
    x = 21,822.34

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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.