Home / 21,191.19-29,240.60-12,691.32

Finding the Fourth Proportional to 21,191.19, 29,240.60 and 12,691.32

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Solution

The fourth proportional to 21,191.19, 29,240.60 and 12,691.32 is: 17,512.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.19 : 29,240.60 = 12,691.32 : x
  2. Step 2: Convert to fraction form
    21,191.19/29,240.60 = 12,691.32/x
  3. Step 3: Cross multiply
    21,191.19x = 29,240.60 × 12,691.32
  4. Step 4: Simplify right side
    21,191.19x = 371,101,748.14
  5. Step 5: Solve for x
    x = 371,101,748.14/21,191.19
  6. Step 6: Final answer
    x = 17,512.08

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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.