Home / 21,127.65-29,156.19-13,574.02

Finding the Fourth Proportional to 21,127.65, 29,156.19 and 13,574.02

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Solution

The fourth proportional to 21,127.65, 29,156.19 and 13,574.02 is: 18,732.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.65 : 29,156.19 = 13,574.02 : x
  2. Step 2: Convert to fraction form
    21,127.65/29,156.19 = 13,574.02/x
  3. Step 3: Cross multiply
    21,127.65x = 29,156.19 × 13,574.02
  4. Step 4: Simplify right side
    21,127.65x = 395,766,706.18
  5. Step 5: Solve for x
    x = 395,766,706.18/21,127.65
  6. Step 6: Final answer
    x = 18,732.17

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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.