Home / 20,387.61-30,610.62-15,138.81

Finding the Fourth Proportional to 20,387.61, 30,610.62 and 15,138.81

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Solution

The fourth proportional to 20,387.61, 30,610.62 and 15,138.81 is: 22,729.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.61 : 30,610.62 = 15,138.81 : x
  2. Step 2: Convert to fraction form
    20,387.61/30,610.62 = 15,138.81/x
  3. Step 3: Cross multiply
    20,387.61x = 30,610.62 × 15,138.81
  4. Step 4: Simplify right side
    20,387.61x = 463,408,360.16
  5. Step 5: Solve for x
    x = 463,408,360.16/20,387.61
  6. Step 6: Final answer
    x = 22,729.90

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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.