Home / 28,432.78-39,253.28-19,717.18

Finding the Fourth Proportional to 28,432.78, 39,253.28 and 19,717.18

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Solution

The fourth proportional to 28,432.78, 39,253.28 and 19,717.18 is: 27,220.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,432.78 : 39,253.28 = 19,717.18 : x
  2. Step 2: Convert to fraction form
    28,432.78/39,253.28 = 19,717.18/x
  3. Step 3: Cross multiply
    28,432.78x = 39,253.28 × 19,717.18
  4. Step 4: Simplify right side
    28,432.78x = 773,963,987.35
  5. Step 5: Solve for x
    x = 773,963,987.35/28,432.78
  6. Step 6: Final answer
    x = 27,220.83

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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.