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Finding the Fourth Proportional to 8,865.40, 12,233.88 and 5,674.20

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Solution

The fourth proportional to 8,865.40, 12,233.88 and 5,674.20 is: 7,830.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,865.40 : 12,233.88 = 5,674.20 : x
  2. Step 2: Convert to fraction form
    8,865.40/12,233.88 = 5,674.20/x
  3. Step 3: Cross multiply
    8,865.40x = 12,233.88 × 5,674.20
  4. Step 4: Simplify right side
    8,865.40x = 69,417,481.90
  5. Step 5: Solve for x
    x = 69,417,481.90/8,865.40
  6. Step 6: Final answer
    x = 7,830.16

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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.