Home / 21,001.47-31,502.22-19,718.43

Finding the Fourth Proportional to 21,001.47, 31,502.22 and 19,718.43

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Solution

The fourth proportional to 21,001.47, 31,502.22 and 19,718.43 is: 29,577.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.47 : 31,502.22 = 19,718.43 : x
  2. Step 2: Convert to fraction form
    21,001.47/31,502.22 = 19,718.43/x
  3. Step 3: Cross multiply
    21,001.47x = 31,502.22 × 19,718.43
  4. Step 4: Simplify right side
    21,001.47x = 621,174,319.91
  5. Step 5: Solve for x
    x = 621,174,319.91/21,001.47
  6. Step 6: Final answer
    x = 29,577.66

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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.