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Finding the Fourth Proportional to 8,867.28, 12,242.08 and 7,883.20

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Solution

The fourth proportional to 8,867.28, 12,242.08 and 7,883.20 is: 10,883.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,867.28 : 12,242.08 = 7,883.20 : x
  2. Step 2: Convert to fraction form
    8,867.28/12,242.08 = 7,883.20/x
  3. Step 3: Cross multiply
    8,867.28x = 12,242.08 × 7,883.20
  4. Step 4: Simplify right side
    8,867.28x = 96,506,765.06
  5. Step 5: Solve for x
    x = 96,506,765.06/8,867.28
  6. Step 6: Final answer
    x = 10,883.47

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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.