Home / 21,167.60-29,215.10-12,213.86

Finding the Fourth Proportional to 21,167.60, 29,215.10 and 12,213.86

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Solution

The fourth proportional to 21,167.60, 29,215.10 and 12,213.86 is: 16,857.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,167.60 : 29,215.10 = 12,213.86 : x
  2. Step 2: Convert to fraction form
    21,167.60/29,215.10 = 12,213.86/x
  3. Step 3: Cross multiply
    21,167.60x = 29,215.10 × 12,213.86
  4. Step 4: Simplify right side
    21,167.60x = 356,829,080.22
  5. Step 5: Solve for x
    x = 356,829,080.22/21,167.60
  6. Step 6: Final answer
    x = 16,857.32

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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.