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Finding the Fourth Proportional to 8,913.95, 12,304.31 and 5,138.61

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Solution

The fourth proportional to 8,913.95, 12,304.31 and 5,138.61 is: 7,093.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,913.95 : 12,304.31 = 5,138.61 : x
  2. Step 2: Convert to fraction form
    8,913.95/12,304.31 = 5,138.61/x
  3. Step 3: Cross multiply
    8,913.95x = 12,304.31 × 5,138.61
  4. Step 4: Simplify right side
    8,913.95x = 63,227,024.72
  5. Step 5: Solve for x
    x = 63,227,024.72/8,913.95
  6. Step 6: Final answer
    x = 7,093.05

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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.