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Finding the Fourth Proportional to 11,445.12, 15,790.08 and 9,358.08

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Solution

The fourth proportional to 11,445.12, 15,790.08 and 9,358.08 is: 12,910.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,445.12 : 15,790.08 = 9,358.08 : x
  2. Step 2: Convert to fraction form
    11,445.12/15,790.08 = 9,358.08/x
  3. Step 3: Cross multiply
    11,445.12x = 15,790.08 × 9,358.08
  4. Step 4: Simplify right side
    11,445.12x = 147,764,831.85
  5. Step 5: Solve for x
    x = 147,764,831.85/11,445.12
  6. Step 6: Final answer
    x = 12,910.73

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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.