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Finding the Fourth Proportional to 8,657.54, 11,939.55 and 5,672.28

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Solution

The fourth proportional to 8,657.54, 11,939.55 and 5,672.28 is: 7,822.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,657.54 : 11,939.55 = 5,672.28 : x
  2. Step 2: Convert to fraction form
    8,657.54/11,939.55 = 5,672.28/x
  3. Step 3: Cross multiply
    8,657.54x = 11,939.55 × 5,672.28
  4. Step 4: Simplify right side
    8,657.54x = 67,724,470.67
  5. Step 5: Solve for x
    x = 67,724,470.67/8,657.54
  6. Step 6: Final answer
    x = 7,822.60

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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.