Home / 20,115.80-30,176.40-6,972.20

Finding the Fourth Proportional to 20,115.80, 30,176.40 and 6,972.20

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Solution

The fourth proportional to 20,115.80, 30,176.40 and 6,972.20 is: 10,459.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.80 : 30,176.40 = 6,972.20 : x
  2. Step 2: Convert to fraction form
    20,115.80/30,176.40 = 6,972.20/x
  3. Step 3: Cross multiply
    20,115.80x = 30,176.40 × 6,972.20
  4. Step 4: Simplify right side
    20,115.80x = 210,395,896.08
  5. Step 5: Solve for x
    x = 210,395,896.08/20,115.80
  6. Step 6: Final answer
    x = 10,459.24

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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.