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Finding the Fourth Proportional to 5,715.60, 8,620.08 and 5,456.40

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Solution

The fourth proportional to 5,715.60, 8,620.08 and 5,456.40 is: 8,229.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,715.60 : 8,620.08 = 5,456.40 : x
  2. Step 2: Convert to fraction form
    5,715.60/8,620.08 = 5,456.40/x
  3. Step 3: Cross multiply
    5,715.60x = 8,620.08 × 5,456.40
  4. Step 4: Simplify right side
    5,715.60x = 47,034,604.51
  5. Step 5: Solve for x
    x = 47,034,604.51/5,715.60
  6. Step 6: Final answer
    x = 8,229.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.