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Finding the Fourth Proportional to 15,155.01, 20,912.99 and 8,440.29

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Solution

The fourth proportional to 15,155.01, 20,912.99 and 8,440.29 is: 11,647.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,155.01 : 20,912.99 = 8,440.29 : x
  2. Step 2: Convert to fraction form
    15,155.01/20,912.99 = 8,440.29/x
  3. Step 3: Cross multiply
    15,155.01x = 20,912.99 × 8,440.29
  4. Step 4: Simplify right side
    15,155.01x = 176,511,658.17
  5. Step 5: Solve for x
    x = 176,511,658.17/15,155.01
  6. Step 6: Final answer
    x = 11,647.08

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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.