Home / 21,622.38-29,838.42-12,191.28

Finding the Fourth Proportional to 21,622.38, 29,838.42 and 12,191.28

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Solution

The fourth proportional to 21,622.38, 29,838.42 and 12,191.28 is: 16,823.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,622.38 : 29,838.42 = 12,191.28 : x
  2. Step 2: Convert to fraction form
    21,622.38/29,838.42 = 12,191.28/x
  3. Step 3: Cross multiply
    21,622.38x = 29,838.42 × 12,191.28
  4. Step 4: Simplify right side
    21,622.38x = 363,768,532.98
  5. Step 5: Solve for x
    x = 363,768,532.98/21,622.38
  6. Step 6: Final answer
    x = 16,823.70

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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.