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Finding the Fourth Proportional to 15,155.46, 20,914.02 and 8,440.56

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Solution

The fourth proportional to 15,155.46, 20,914.02 and 8,440.56 is: 11,647.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,155.46 : 20,914.02 = 8,440.56 : x
  2. Step 2: Convert to fraction form
    15,155.46/20,914.02 = 8,440.56/x
  3. Step 3: Cross multiply
    15,155.46x = 20,914.02 × 8,440.56
  4. Step 4: Simplify right side
    15,155.46x = 176,526,040.65
  5. Step 5: Solve for x
    x = 176,526,040.65/15,155.46
  6. Step 6: Final answer
    x = 11,647.69

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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.