Home / 21,302.21-29,377.95-13,345.31

Finding the Fourth Proportional to 21,302.21, 29,377.95 and 13,345.31

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Solution

The fourth proportional to 21,302.21, 29,377.95 and 13,345.31 is: 18,404.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,302.21 : 29,377.95 = 13,345.31 : x
  2. Step 2: Convert to fraction form
    21,302.21/29,377.95 = 13,345.31/x
  3. Step 3: Cross multiply
    21,302.21x = 29,377.95 × 13,345.31
  4. Step 4: Simplify right side
    21,302.21x = 392,057,849.91
  5. Step 5: Solve for x
    x = 392,057,849.91/21,302.21
  6. Step 6: Final answer
    x = 18,404.56

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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.