Home / 20,398.87-28,127.95-14,100.31

Finding the Fourth Proportional to 20,398.87, 28,127.95 and 14,100.31

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Solution

The fourth proportional to 20,398.87, 28,127.95 and 14,100.31 is: 19,442.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,398.87 : 28,127.95 = 14,100.31 : x
  2. Step 2: Convert to fraction form
    20,398.87/28,127.95 = 14,100.31/x
  3. Step 3: Cross multiply
    20,398.87x = 28,127.95 × 14,100.31
  4. Step 4: Simplify right side
    20,398.87x = 396,612,814.66
  5. Step 5: Solve for x
    x = 396,612,814.66/20,398.87
  6. Step 6: Final answer
    x = 19,442.88

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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.