Home / 15,147.10-20,902.80-8,774.56

Finding the Fourth Proportional to 15,147.10, 20,902.80 and 8,774.56

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Solution

The fourth proportional to 15,147.10, 20,902.80 and 8,774.56 is: 12,108.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,147.10 : 20,902.80 = 8,774.56 : x
  2. Step 2: Convert to fraction form
    15,147.10/20,902.80 = 8,774.56/x
  3. Step 3: Cross multiply
    15,147.10x = 20,902.80 × 8,774.56
  4. Step 4: Simplify right side
    15,147.10x = 183,412,872.77
  5. Step 5: Solve for x
    x = 183,412,872.77/15,147.10
  6. Step 6: Final answer
    x = 12,108.78

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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.