Home / 21,001.97-31,502.95-5,418.38

Finding the Fourth Proportional to 21,001.97, 31,502.95 and 5,418.38

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Solution

The fourth proportional to 21,001.97, 31,502.95 and 5,418.38 is: 8,127.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.97 : 31,502.95 = 5,418.38 : x
  2. Step 2: Convert to fraction form
    21,001.97/31,502.95 = 5,418.38/x
  3. Step 3: Cross multiply
    21,001.97x = 31,502.95 × 5,418.38
  4. Step 4: Simplify right side
    21,001.97x = 170,694,783.16
  5. Step 5: Solve for x
    x = 170,694,783.16/21,001.97
  6. Step 6: Final answer
    x = 8,127.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.