Home / 20,772.18-31,158.33-5,189.79

Finding the Fourth Proportional to 20,772.18, 31,158.33 and 5,189.79

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Solution

The fourth proportional to 20,772.18, 31,158.33 and 5,189.79 is: 7,784.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.18 : 31,158.33 = 5,189.79 : x
  2. Step 2: Convert to fraction form
    20,772.18/31,158.33 = 5,189.79/x
  3. Step 3: Cross multiply
    20,772.18x = 31,158.33 × 5,189.79
  4. Step 4: Simplify right side
    20,772.18x = 161,705,189.45
  5. Step 5: Solve for x
    x = 161,705,189.45/20,772.18
  6. Step 6: Final answer
    x = 7,784.70

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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.