Home / 13,521.72-20,280.24-3,658.70

Finding the Fourth Proportional to 13,521.72, 20,280.24 and 3,658.70

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Solution

The fourth proportional to 13,521.72, 20,280.24 and 3,658.70 is: 5,487.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,521.72 : 20,280.24 = 3,658.70 : x
  2. Step 2: Convert to fraction form
    13,521.72/20,280.24 = 3,658.70/x
  3. Step 3: Cross multiply
    13,521.72x = 20,280.24 × 3,658.70
  4. Step 4: Simplify right side
    13,521.72x = 74,199,212.69
  5. Step 5: Solve for x
    x = 74,199,212.69/13,521.72
  6. Step 6: Final answer
    x = 5,487.41

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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.