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Finding the Fourth Proportional to 8,737.78, 12,069.93 and 6,981.70

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Solution

The fourth proportional to 8,737.78, 12,069.93 and 6,981.70 is: 9,644.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,737.78 : 12,069.93 = 6,981.70 : x
  2. Step 2: Convert to fraction form
    8,737.78/12,069.93 = 6,981.70/x
  3. Step 3: Cross multiply
    8,737.78x = 12,069.93 × 6,981.70
  4. Step 4: Simplify right side
    8,737.78x = 84,268,630.28
  5. Step 5: Solve for x
    x = 84,268,630.28/8,737.78
  6. Step 6: Final answer
    x = 9,644.17

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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.