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Finding the Fourth Proportional to 15,155.16, 20,914.74 and 8,440.36

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Solution

The fourth proportional to 15,155.16, 20,914.74 and 8,440.36 is: 11,648.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,155.16 : 20,914.74 = 8,440.36 : x
  2. Step 2: Convert to fraction form
    15,155.16/20,914.74 = 8,440.36/x
  3. Step 3: Cross multiply
    15,155.16x = 20,914.74 × 8,440.36
  4. Step 4: Simplify right side
    15,155.16x = 176,527,934.91
  5. Step 5: Solve for x
    x = 176,527,934.91/15,155.16
  6. Step 6: Final answer
    x = 11,648.04

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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.