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Finding the Fourth Proportional to 6,387.31, 8,811.99 and 4,712.74

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Solution

The fourth proportional to 6,387.31, 8,811.99 and 4,712.74 is: 6,501.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387.31 : 8,811.99 = 4,712.74 : x
  2. Step 2: Convert to fraction form
    6,387.31/8,811.99 = 4,712.74/x
  3. Step 3: Cross multiply
    6,387.31x = 8,811.99 × 4,712.74
  4. Step 4: Simplify right side
    6,387.31x = 41,528,617.75
  5. Step 5: Solve for x
    x = 41,528,617.75/6,387.31
  6. Step 6: Final answer
    x = 6,501.74

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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.