Home / 28,721.12-39,637.32-16,147.76

Finding the Fourth Proportional to 28,721.12, 39,637.32 and 16,147.76

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Solution

The fourth proportional to 28,721.12, 39,637.32 and 16,147.76 is: 22,285.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,721.12 : 39,637.32 = 16,147.76 : x
  2. Step 2: Convert to fraction form
    28,721.12/39,637.32 = 16,147.76/x
  3. Step 3: Cross multiply
    28,721.12x = 39,637.32 × 16,147.76
  4. Step 4: Simplify right side
    28,721.12x = 640,053,930.40
  5. Step 5: Solve for x
    x = 640,053,930.40/28,721.12
  6. Step 6: Final answer
    x = 22,285.13

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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.