Home / 21,104.11-29,129.43-13,141.63

Finding the Fourth Proportional to 21,104.11, 29,129.43 and 13,141.63

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Solution

The fourth proportional to 21,104.11, 29,129.43 and 13,141.63 is: 18,139.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,104.11 : 29,129.43 = 13,141.63 : x
  2. Step 2: Convert to fraction form
    21,104.11/29,129.43 = 13,141.63/x
  3. Step 3: Cross multiply
    21,104.11x = 29,129.43 × 13,141.63
  4. Step 4: Simplify right side
    21,104.11x = 382,808,191.17
  5. Step 5: Solve for x
    x = 382,808,191.17/21,104.11
  6. Step 6: Final answer
    x = 18,139.04

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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.