Home / 20,105.60-30,158.40-8,257.36

Finding the Fourth Proportional to 20,105.60, 30,158.40 and 8,257.36

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Solution

The fourth proportional to 20,105.60, 30,158.40 and 8,257.36 is: 12,386.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.60 : 30,158.40 = 8,257.36 : x
  2. Step 2: Convert to fraction form
    20,105.60/30,158.40 = 8,257.36/x
  3. Step 3: Cross multiply
    20,105.60x = 30,158.40 × 8,257.36
  4. Step 4: Simplify right side
    20,105.60x = 249,028,765.82
  5. Step 5: Solve for x
    x = 249,028,765.82/20,105.60
  6. Step 6: Final answer
    x = 12,386.04

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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.