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Finding the Fourth Proportional to 9,129.67, 12,599.11 and 5,355.71

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Solution

The fourth proportional to 9,129.67, 12,599.11 and 5,355.71 is: 7,390.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,129.67 : 12,599.11 = 5,355.71 : x
  2. Step 2: Convert to fraction form
    9,129.67/12,599.11 = 5,355.71/x
  3. Step 3: Cross multiply
    9,129.67x = 12,599.11 × 5,355.71
  4. Step 4: Simplify right side
    9,129.67x = 67,477,179.42
  5. Step 5: Solve for x
    x = 67,477,179.42/9,129.67
  6. Step 6: Final answer
    x = 7,390.98

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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.