Home / 21,506.13-29,685.42-13,939.11

Finding the Fourth Proportional to 21,506.13, 29,685.42 and 13,939.11

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Solution

The fourth proportional to 21,506.13, 29,685.42 and 13,939.11 is: 19,240.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,506.13 : 29,685.42 = 13,939.11 : x
  2. Step 2: Convert to fraction form
    21,506.13/29,685.42 = 13,939.11/x
  3. Step 3: Cross multiply
    21,506.13x = 29,685.42 × 13,939.11
  4. Step 4: Simplify right side
    21,506.13x = 413,788,334.78
  5. Step 5: Solve for x
    x = 413,788,334.78/21,506.13
  6. Step 6: Final answer
    x = 19,240.48

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1.5x scale

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.