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Finding the Fourth Proportional to 20,424.55, 30,622.41 and 7,934.17

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Solution

The fourth proportional to 20,424.55, 30,622.41 and 7,934.17 is: 11,895.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,424.55 : 30,622.41 = 7,934.17 : x
  2. Step 2: Convert to fraction form
    20,424.55/30,622.41 = 7,934.17/x
  3. Step 3: Cross multiply
    20,424.55x = 30,622.41 × 7,934.17
  4. Step 4: Simplify right side
    20,424.55x = 242,963,406.75
  5. Step 5: Solve for x
    x = 242,963,406.75/20,424.55
  6. Step 6: Final answer
    x = 11,895.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.