Home / 15,144.25-20,900.35-8,521.53

Finding the Fourth Proportional to 15,144.25, 20,900.35 and 8,521.53

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Solution

The fourth proportional to 15,144.25, 20,900.35 and 8,521.53 is: 11,760.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,144.25 : 20,900.35 = 8,521.53 : x
  2. Step 2: Convert to fraction form
    15,144.25/20,900.35 = 8,521.53/x
  3. Step 3: Cross multiply
    15,144.25x = 20,900.35 × 8,521.53
  4. Step 4: Simplify right side
    15,144.25x = 178,102,916.93
  5. Step 5: Solve for x
    x = 178,102,916.93/15,144.25
  6. Step 6: Final answer
    x = 11,760.43

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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.