Home / 21,320.66-29,425.29-15,372.02

Finding the Fourth Proportional to 21,320.66, 29,425.29 and 15,372.02

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Solution

The fourth proportional to 21,320.66, 29,425.29 and 15,372.02 is: 21,215.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.66 : 29,425.29 = 15,372.02 : x
  2. Step 2: Convert to fraction form
    21,320.66/29,425.29 = 15,372.02/x
  3. Step 3: Cross multiply
    21,320.66x = 29,425.29 × 15,372.02
  4. Step 4: Simplify right side
    21,320.66x = 452,326,146.39
  5. Step 5: Solve for x
    x = 452,326,146.39/21,320.66
  6. Step 6: Final answer
    x = 21,215.39

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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.