Home / 15,261.78-21,060.90-8,974.56

Finding the Fourth Proportional to 15,261.78, 21,060.90 and 8,974.56

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Solution

The fourth proportional to 15,261.78, 21,060.90 and 8,974.56 is: 12,384.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,261.78 : 21,060.90 = 8,974.56 : x
  2. Step 2: Convert to fraction form
    15,261.78/21,060.90 = 8,974.56/x
  3. Step 3: Cross multiply
    15,261.78x = 21,060.90 × 8,974.56
  4. Step 4: Simplify right side
    15,261.78x = 189,012,310.70
  5. Step 5: Solve for x
    x = 189,012,310.70/15,261.78
  6. Step 6: Final answer
    x = 12,384.68

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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.