Home / 21,710.16-29,959.12-12,278.52

Finding the Fourth Proportional to 21,710.16, 29,959.12 and 12,278.52

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Solution

The fourth proportional to 21,710.16, 29,959.12 and 12,278.52 is: 16,943.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,710.16 : 29,959.12 = 12,278.52 : x
  2. Step 2: Convert to fraction form
    21,710.16/29,959.12 = 12,278.52/x
  3. Step 3: Cross multiply
    21,710.16x = 29,959.12 × 12,278.52
  4. Step 4: Simplify right side
    21,710.16x = 367,853,654.10
  5. Step 5: Solve for x
    x = 367,853,654.10/21,710.16
  6. Step 6: Final answer
    x = 16,943.85

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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.