Home / 13,013.53-19,531.35-5,121.56

Finding the Fourth Proportional to 13,013.53, 19,531.35 and 5,121.56

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Solution

The fourth proportional to 13,013.53, 19,531.35 and 5,121.56 is: 7,686.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,013.53 : 19,531.35 = 5,121.56 : x
  2. Step 2: Convert to fraction form
    13,013.53/19,531.35 = 5,121.56/x
  3. Step 3: Cross multiply
    13,013.53x = 19,531.35 × 5,121.56
  4. Step 4: Simplify right side
    13,013.53x = 100,031,029.73
  5. Step 5: Solve for x
    x = 100,031,029.73/13,013.53
  6. Step 6: Final answer
    x = 7,686.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.