Home / 13,612.05-20,408.76-5,290.38

Finding the Fourth Proportional to 13,612.05, 20,408.76 and 5,290.38

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Solution

The fourth proportional to 13,612.05, 20,408.76 and 5,290.38 is: 7,931.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.05 : 20,408.76 = 5,290.38 : x
  2. Step 2: Convert to fraction form
    13,612.05/20,408.76 = 5,290.38/x
  3. Step 3: Cross multiply
    13,612.05x = 20,408.76 × 5,290.38
  4. Step 4: Simplify right side
    13,612.05x = 107,970,095.73
  5. Step 5: Solve for x
    x = 107,970,095.73/13,612.05
  6. Step 6: Final answer
    x = 7,931.95

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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.