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Finding the Fourth Proportional to 6,251.76, 8,600.40 and 5,655.60

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Solution

The fourth proportional to 6,251.76, 8,600.40 and 5,655.60 is: 7,780.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,251.76 : 8,600.40 = 5,655.60 : x
  2. Step 2: Convert to fraction form
    6,251.76/8,600.40 = 5,655.60/x
  3. Step 3: Cross multiply
    6,251.76x = 8,600.40 × 5,655.60
  4. Step 4: Simplify right side
    6,251.76x = 48,640,422.24
  5. Step 5: Solve for x
    x = 48,640,422.24/6,251.76
  6. Step 6: Final answer
    x = 7,780.28

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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.