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Finding the Fourth Proportional to 6,387.18, 8,811.86 and 4,712.58

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Solution

The fourth proportional to 6,387.18, 8,811.86 and 4,712.58 is: 6,501.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387.18 : 8,811.86 = 4,712.58 : x
  2. Step 2: Convert to fraction form
    6,387.18/8,811.86 = 4,712.58/x
  3. Step 3: Cross multiply
    6,387.18x = 8,811.86 × 4,712.58
  4. Step 4: Simplify right side
    6,387.18x = 41,526,549.61
  5. Step 5: Solve for x
    x = 41,526,549.61/6,387.18
  6. Step 6: Final answer
    x = 6,501.55

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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.