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Finding the Fourth Proportional to 6,393.60, 8,812.80 and 6,307.20

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Solution

The fourth proportional to 6,393.60, 8,812.80 and 6,307.20 is: 8,693.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,393.60 : 8,812.80 = 6,307.20 : x
  2. Step 2: Convert to fraction form
    6,393.60/8,812.80 = 6,307.20/x
  3. Step 3: Cross multiply
    6,393.60x = 8,812.80 × 6,307.20
  4. Step 4: Simplify right side
    6,393.60x = 55,584,092.16
  5. Step 5: Solve for x
    x = 55,584,092.16/6,393.60
  6. Step 6: Final answer
    x = 8,693.71

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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.