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Finding the Fourth Proportional to 7,158.16, 9,867.90 and 5,027.20

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Solution

The fourth proportional to 7,158.16, 9,867.90 and 5,027.20 is: 6,930.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,158.16 : 9,867.90 = 5,027.20 : x
  2. Step 2: Convert to fraction form
    7,158.16/9,867.90 = 5,027.20/x
  3. Step 3: Cross multiply
    7,158.16x = 9,867.90 × 5,027.20
  4. Step 4: Simplify right side
    7,158.16x = 49,607,906.88
  5. Step 5: Solve for x
    x = 49,607,906.88/7,158.16
  6. Step 6: Final answer
    x = 6,930.26

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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.