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Finding the Fourth Proportional to 13,598.60, 18,765.78 and 7,631.72

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Solution

The fourth proportional to 13,598.60, 18,765.78 and 7,631.72 is: 10,531.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,598.60 : 18,765.78 = 7,631.72 : x
  2. Step 2: Convert to fraction form
    13,598.60/18,765.78 = 7,631.72/x
  3. Step 3: Cross multiply
    13,598.60x = 18,765.78 × 7,631.72
  4. Step 4: Simplify right side
    13,598.60x = 143,215,178.54
  5. Step 5: Solve for x
    x = 143,215,178.54/13,598.60
  6. Step 6: Final answer
    x = 10,531.61

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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.