Home / 20,081.12-30,119.45-5,291.53

Finding the Fourth Proportional to 20,081.12, 30,119.45 and 5,291.53

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Solution

The fourth proportional to 20,081.12, 30,119.45 and 5,291.53 is: 7,936.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.12 : 30,119.45 = 5,291.53 : x
  2. Step 2: Convert to fraction form
    20,081.12/30,119.45 = 5,291.53/x
  3. Step 3: Cross multiply
    20,081.12x = 30,119.45 × 5,291.53
  4. Step 4: Simplify right side
    20,081.12x = 159,377,871.50
  5. Step 5: Solve for x
    x = 159,377,871.50/20,081.12
  6. Step 6: Final answer
    x = 7,936.70

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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.