Home / 21,154.49-31,731.77-8,672.29

Finding the Fourth Proportional to 21,154.49, 31,731.77 and 8,672.29

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Solution

The fourth proportional to 21,154.49, 31,731.77 and 8,672.29 is: 13,008.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,154.49 : 31,731.77 = 8,672.29 : x
  2. Step 2: Convert to fraction form
    21,154.49/31,731.77 = 8,672.29/x
  3. Step 3: Cross multiply
    21,154.49x = 31,731.77 × 8,672.29
  4. Step 4: Simplify right side
    21,154.49x = 275,187,111.65
  5. Step 5: Solve for x
    x = 275,187,111.65/21,154.49
  6. Step 6: Final answer
    x = 13,008.45

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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.