Home / 20,120.16-30,158.36-8,419.71

Finding the Fourth Proportional to 20,120.16, 30,158.36 and 8,419.71

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Solution

The fourth proportional to 20,120.16, 30,158.36 and 8,419.71 is: 12,620.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.16 : 30,158.36 = 8,419.71 : x
  2. Step 2: Convert to fraction form
    20,120.16/30,158.36 = 8,419.71/x
  3. Step 3: Cross multiply
    20,120.16x = 30,158.36 × 8,419.71
  4. Step 4: Simplify right side
    20,120.16x = 253,924,603.18
  5. Step 5: Solve for x
    x = 253,924,603.18/20,120.16
  6. Step 6: Final answer
    x = 12,620.41

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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.