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Finding the Fourth Proportional to 8,969.32, 13,454.28 and 7,421.44

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Solution

The fourth proportional to 8,969.32, 13,454.28 and 7,421.44 is: 11,132.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,969.32 : 13,454.28 = 7,421.44 : x
  2. Step 2: Convert to fraction form
    8,969.32/13,454.28 = 7,421.44/x
  3. Step 3: Cross multiply
    8,969.32x = 13,454.28 × 7,421.44
  4. Step 4: Simplify right side
    8,969.32x = 99,850,131.76
  5. Step 5: Solve for x
    x = 99,850,131.76/8,969.32
  6. Step 6: Final answer
    x = 11,132.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.