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Finding the Fourth Proportional to 8,953.20, 12,355.20 and 4,974.12

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Solution

The fourth proportional to 8,953.20, 12,355.20 and 4,974.12 is: 6,864.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,953.20 : 12,355.20 = 4,974.12 : x
  2. Step 2: Convert to fraction form
    8,953.20/12,355.20 = 4,974.12/x
  3. Step 3: Cross multiply
    8,953.20x = 12,355.20 × 4,974.12
  4. Step 4: Simplify right side
    8,953.20x = 61,456,247.42
  5. Step 5: Solve for x
    x = 61,456,247.42/8,953.20
  6. Step 6: Final answer
    x = 6,864.17

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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.