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Finding the Fourth Proportional to 6,481.60, 8,938.74 and 4,242.76

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Solution

The fourth proportional to 6,481.60, 8,938.74 and 4,242.76 is: 5,851.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,481.60 : 8,938.74 = 4,242.76 : x
  2. Step 2: Convert to fraction form
    6,481.60/8,938.74 = 4,242.76/x
  3. Step 3: Cross multiply
    6,481.60x = 8,938.74 × 4,242.76
  4. Step 4: Simplify right side
    6,481.60x = 37,924,928.52
  5. Step 5: Solve for x
    x = 37,924,928.52/6,481.60
  6. Step 6: Final answer
    x = 5,851.17

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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.