Home / 21,132.12-29,162.54-11,700.90

Finding the Fourth Proportional to 21,132.12, 29,162.54 and 11,700.90

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Solution

The fourth proportional to 21,132.12, 29,162.54 and 11,700.90 is: 16,147.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,132.12 : 29,162.54 = 11,700.90 : x
  2. Step 2: Convert to fraction form
    21,132.12/29,162.54 = 11,700.90/x
  3. Step 3: Cross multiply
    21,132.12x = 29,162.54 × 11,700.90
  4. Step 4: Simplify right side
    21,132.12x = 341,227,964.29
  5. Step 5: Solve for x
    x = 341,227,964.29/21,132.12
  6. Step 6: Final answer
    x = 16,147.36

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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.