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Finding the Fourth Proportional to 8,907.20, 12,279.84 and 7,507.52

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Solution

The fourth proportional to 8,907.20, 12,279.84 and 7,507.52 is: 10,350.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,907.20 : 12,279.84 = 7,507.52 : x
  2. Step 2: Convert to fraction form
    8,907.20/12,279.84 = 7,507.52/x
  3. Step 3: Cross multiply
    8,907.20x = 12,279.84 × 7,507.52
  4. Step 4: Simplify right side
    8,907.20x = 92,191,144.40
  5. Step 5: Solve for x
    x = 92,191,144.40/8,907.20
  6. Step 6: Final answer
    x = 10,350.18

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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.