Home / 20,078.20-30,117.30-15,412.60

Finding the Fourth Proportional to 20,078.20, 30,117.30 and 15,412.60

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Solution

The fourth proportional to 20,078.20, 30,117.30 and 15,412.60 is: 23,118.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.20 : 30,117.30 = 15,412.60 : x
  2. Step 2: Convert to fraction form
    20,078.20/30,117.30 = 15,412.60/x
  3. Step 3: Cross multiply
    20,078.20x = 30,117.30 × 15,412.60
  4. Step 4: Simplify right side
    20,078.20x = 464,185,897.98
  5. Step 5: Solve for x
    x = 464,185,897.98/20,078.20
  6. Step 6: Final answer
    x = 23,118.90

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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.