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Finding the Fourth Proportional to 8,409.60, 12,609.36 and 2,565.12

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Solution

The fourth proportional to 8,409.60, 12,609.36 and 2,565.12 is: 3,846.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,409.60 : 12,609.36 = 2,565.12 : x
  2. Step 2: Convert to fraction form
    8,409.60/12,609.36 = 2,565.12/x
  3. Step 3: Cross multiply
    8,409.60x = 12,609.36 × 2,565.12
  4. Step 4: Simplify right side
    8,409.60x = 32,344,521.52
  5. Step 5: Solve for x
    x = 32,344,521.52/8,409.60
  6. Step 6: Final answer
    x = 3,846.14

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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.