Home / 21,221.10-29,288.88-12,267.18

Finding the Fourth Proportional to 21,221.10, 29,288.88 and 12,267.18

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Solution

The fourth proportional to 21,221.10, 29,288.88 and 12,267.18 is: 16,930.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.10 : 29,288.88 = 12,267.18 : x
  2. Step 2: Convert to fraction form
    21,221.10/29,288.88 = 12,267.18/x
  3. Step 3: Cross multiply
    21,221.10x = 29,288.88 × 12,267.18
  4. Step 4: Simplify right side
    21,221.10x = 359,291,962.96
  5. Step 5: Solve for x
    x = 359,291,962.96/21,221.10
  6. Step 6: Final answer
    x = 16,930.88

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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.