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Finding the Fourth Proportional to 22,307.84, 30,790.21 and 15,149.70

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Solution

The fourth proportional to 22,307.84, 30,790.21 and 15,149.70 is: 20,910.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,307.84 : 30,790.21 = 15,149.70 : x
  2. Step 2: Convert to fraction form
    22,307.84/30,790.21 = 15,149.70/x
  3. Step 3: Cross multiply
    22,307.84x = 30,790.21 × 15,149.70
  4. Step 4: Simplify right side
    22,307.84x = 466,462,434.97
  5. Step 5: Solve for x
    x = 466,462,434.97/22,307.84
  6. Step 6: Final answer
    x = 20,910.25

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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.