Home / 21,242.39-29,311.88-11,680.70

Finding the Fourth Proportional to 21,242.39, 29,311.88 and 11,680.70

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Solution

The fourth proportional to 21,242.39, 29,311.88 and 11,680.70 is: 16,117.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,242.39 : 29,311.88 = 11,680.70 : x
  2. Step 2: Convert to fraction form
    21,242.39/29,311.88 = 11,680.70/x
  3. Step 3: Cross multiply
    21,242.39x = 29,311.88 × 11,680.70
  4. Step 4: Simplify right side
    21,242.39x = 342,383,071.75
  5. Step 5: Solve for x
    x = 342,383,071.75/21,242.39
  6. Step 6: Final answer
    x = 16,117.92

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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.