Home / 20,770.72-31,160.84-5,979.76

Finding the Fourth Proportional to 20,770.72, 31,160.84 and 5,979.76

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Solution

The fourth proportional to 20,770.72, 31,160.84 and 5,979.76 is: 8,971.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.72 : 31,160.84 = 5,979.76 : x
  2. Step 2: Convert to fraction form
    20,770.72/31,160.84 = 5,979.76/x
  3. Step 3: Cross multiply
    20,770.72x = 31,160.84 × 5,979.76
  4. Step 4: Simplify right side
    20,770.72x = 186,334,344.60
  5. Step 5: Solve for x
    x = 186,334,344.60/20,770.72
  6. Step 6: Final answer
    x = 8,971.01

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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.