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Finding the Fourth Proportional to 6,417.59, 8,856.87 and 3,899.12

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Solution

The fourth proportional to 6,417.59, 8,856.87 and 3,899.12 is: 5,381.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,417.59 : 8,856.87 = 3,899.12 : x
  2. Step 2: Convert to fraction form
    6,417.59/8,856.87 = 3,899.12/x
  3. Step 3: Cross multiply
    6,417.59x = 8,856.87 × 3,899.12
  4. Step 4: Simplify right side
    6,417.59x = 34,533,998.95
  5. Step 5: Solve for x
    x = 34,533,998.95/6,417.59
  6. Step 6: Final answer
    x = 5,381.15

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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.