Home / 20,178.74-30,269.22-6,139.28

Finding the Fourth Proportional to 20,178.74, 30,269.22 and 6,139.28

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Solution

The fourth proportional to 20,178.74, 30,269.22 and 6,139.28 is: 9,209.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,178.74 : 30,269.22 = 6,139.28 : x
  2. Step 2: Convert to fraction form
    20,178.74/30,269.22 = 6,139.28/x
  3. Step 3: Cross multiply
    20,178.74x = 30,269.22 × 6,139.28
  4. Step 4: Simplify right side
    20,178.74x = 185,831,065.62
  5. Step 5: Solve for x
    x = 185,831,065.62/20,178.74
  6. Step 6: Final answer
    x = 9,209.25

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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.