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Finding the Fourth Proportional to 9,918.20, 13,675.02 and 8,737.40

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Solution

The fourth proportional to 9,918.20, 13,675.02 and 8,737.40 is: 12,046.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,918.20 : 13,675.02 = 8,737.40 : x
  2. Step 2: Convert to fraction form
    9,918.20/13,675.02 = 8,737.40/x
  3. Step 3: Cross multiply
    9,918.20x = 13,675.02 × 8,737.40
  4. Step 4: Simplify right side
    9,918.20x = 119,484,119.75
  5. Step 5: Solve for x
    x = 119,484,119.75/9,918.20
  6. Step 6: Final answer
    x = 12,046.96

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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.