Home / 21,022.80-29,013.49-15,708.39

Finding the Fourth Proportional to 21,022.80, 29,013.49 and 15,708.39

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Solution

The fourth proportional to 21,022.80, 29,013.49 and 15,708.39 is: 21,679.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.80 : 29,013.49 = 15,708.39 : x
  2. Step 2: Convert to fraction form
    21,022.80/29,013.49 = 15,708.39/x
  3. Step 3: Cross multiply
    21,022.80x = 29,013.49 × 15,708.39
  4. Step 4: Simplify right side
    21,022.80x = 455,755,216.18
  5. Step 5: Solve for x
    x = 455,755,216.18/21,022.80
  6. Step 6: Final answer
    x = 21,679.09

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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.