Home / 20,138.74-30,191.48-8,886.07

Finding the Fourth Proportional to 20,138.74, 30,191.48 and 8,886.07

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Solution

The fourth proportional to 20,138.74, 30,191.48 and 8,886.07 is: 13,321.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.74 : 30,191.48 = 8,886.07 : x
  2. Step 2: Convert to fraction form
    20,138.74/30,191.48 = 8,886.07/x
  3. Step 3: Cross multiply
    20,138.74x = 30,191.48 × 8,886.07
  4. Step 4: Simplify right side
    20,138.74x = 268,283,409.30
  5. Step 5: Solve for x
    x = 268,283,409.30/20,138.74
  6. Step 6: Final answer
    x = 13,321.76

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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.