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Finding the Fourth Proportional to 6,392.52, 8,812.80 and 4,971.78

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Solution

The fourth proportional to 6,392.52, 8,812.80 and 4,971.78 is: 6,854.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,392.52 : 8,812.80 = 4,971.78 : x
  2. Step 2: Convert to fraction form
    6,392.52/8,812.80 = 4,971.78/x
  3. Step 3: Cross multiply
    6,392.52x = 8,812.80 × 4,971.78
  4. Step 4: Simplify right side
    6,392.52x = 43,815,302.78
  5. Step 5: Solve for x
    x = 43,815,302.78/6,392.52
  6. Step 6: Final answer
    x = 6,854.15

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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.