Home / 21,135.52-29,164.08-12,748.96

Finding the Fourth Proportional to 21,135.52, 29,164.08 and 12,748.96

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Solution

The fourth proportional to 21,135.52, 29,164.08 and 12,748.96 is: 17,591.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.52 : 29,164.08 = 12,748.96 : x
  2. Step 2: Convert to fraction form
    21,135.52/29,164.08 = 12,748.96/x
  3. Step 3: Cross multiply
    21,135.52x = 29,164.08 × 12,748.96
  4. Step 4: Simplify right side
    21,135.52x = 371,811,689.36
  5. Step 5: Solve for x
    x = 371,811,689.36/21,135.52
  6. Step 6: Final answer
    x = 17,591.79

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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.