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Finding the Fourth Proportional to 8,970.32, 13,455.78 and 7,422.44

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Solution

The fourth proportional to 8,970.32, 13,455.78 and 7,422.44 is: 11,133.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,970.32 : 13,455.78 = 7,422.44 : x
  2. Step 2: Convert to fraction form
    8,970.32/13,455.78 = 7,422.44/x
  3. Step 3: Cross multiply
    8,970.32x = 13,455.78 × 7,422.44
  4. Step 4: Simplify right side
    8,970.32x = 99,874,719.70
  5. Step 5: Solve for x
    x = 99,874,719.70/8,970.32
  6. Step 6: Final answer
    x = 11,133.91

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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.