Home / 21,149.64-29,191.86-12,656.88

Finding the Fourth Proportional to 21,149.64, 29,191.86 and 12,656.88

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Solution

The fourth proportional to 21,149.64, 29,191.86 and 12,656.88 is: 17,469.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.64 : 29,191.86 = 12,656.88 : x
  2. Step 2: Convert to fraction form
    21,149.64/29,191.86 = 12,656.88/x
  3. Step 3: Cross multiply
    21,149.64x = 29,191.86 × 12,656.88
  4. Step 4: Simplify right side
    21,149.64x = 369,477,869.00
  5. Step 5: Solve for x
    x = 369,477,869.00/21,149.64
  6. Step 6: Final answer
    x = 17,469.70

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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.