Home / 21,065.12-29,069.92-11,505.08

Finding the Fourth Proportional to 21,065.12, 29,069.92 and 11,505.08

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Solution

The fourth proportional to 21,065.12, 29,069.92 and 11,505.08 is: 15,877.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,065.12 : 29,069.92 = 11,505.08 : x
  2. Step 2: Convert to fraction form
    21,065.12/29,069.92 = 11,505.08/x
  3. Step 3: Cross multiply
    21,065.12x = 29,069.92 × 11,505.08
  4. Step 4: Simplify right side
    21,065.12x = 334,451,799.11
  5. Step 5: Solve for x
    x = 334,451,799.11/21,065.12
  6. Step 6: Final answer
    x = 15,877.04

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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.