Home / 21,382.23-29,502.45-12,882.09

Finding the Fourth Proportional to 21,382.23, 29,502.45 and 12,882.09

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Solution

The fourth proportional to 21,382.23, 29,502.45 and 12,882.09 is: 17,774.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,382.23 : 29,502.45 = 12,882.09 : x
  2. Step 2: Convert to fraction form
    21,382.23/29,502.45 = 12,882.09/x
  3. Step 3: Cross multiply
    21,382.23x = 29,502.45 × 12,882.09
  4. Step 4: Simplify right side
    21,382.23x = 380,053,216.12
  5. Step 5: Solve for x
    x = 380,053,216.12/21,382.23
  6. Step 6: Final answer
    x = 17,774.26

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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.