Home / 20,104.90-30,159.15-8,415.70

Finding the Fourth Proportional to 20,104.90, 30,159.15 and 8,415.70

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Solution

The fourth proportional to 20,104.90, 30,159.15 and 8,415.70 is: 12,624.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,104.90 : 30,159.15 = 8,415.70 : x
  2. Step 2: Convert to fraction form
    20,104.90/30,159.15 = 8,415.70/x
  3. Step 3: Cross multiply
    20,104.90x = 30,159.15 × 8,415.70
  4. Step 4: Simplify right side
    20,104.90x = 253,810,358.66
  5. Step 5: Solve for x
    x = 253,810,358.66/20,104.90
  6. Step 6: Final answer
    x = 12,624.30

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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.