Home / 15,108.72-20,860.20-13,510.38

Finding the Fourth Proportional to 15,108.72, 20,860.20 and 13,510.38

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Solution

The fourth proportional to 15,108.72, 20,860.20 and 13,510.38 is: 18,653.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,108.72 : 20,860.20 = 13,510.38 : x
  2. Step 2: Convert to fraction form
    15,108.72/20,860.20 = 13,510.38/x
  3. Step 3: Cross multiply
    15,108.72x = 20,860.20 × 13,510.38
  4. Step 4: Simplify right side
    15,108.72x = 281,829,228.88
  5. Step 5: Solve for x
    x = 281,829,228.88/15,108.72
  6. Step 6: Final answer
    x = 18,653.42

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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.