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Finding the Fourth Proportional to 12,657.71, 18,976.32 and 5,267.70

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Solution

The fourth proportional to 12,657.71, 18,976.32 and 5,267.70 is: 7,897.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,657.71 : 18,976.32 = 5,267.70 : x
  2. Step 2: Convert to fraction form
    12,657.71/18,976.32 = 5,267.70/x
  3. Step 3: Cross multiply
    12,657.71x = 18,976.32 × 5,267.70
  4. Step 4: Simplify right side
    12,657.71x = 99,961,560.86
  5. Step 5: Solve for x
    x = 99,961,560.86/12,657.71
  6. Step 6: Final answer
    x = 7,897.28

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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.