Home / 20,908.20-31,359.12-6,113.16

Finding the Fourth Proportional to 20,908.20, 31,359.12 and 6,113.16

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Solution

The fourth proportional to 20,908.20, 31,359.12 and 6,113.16 is: 9,168.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.20 : 31,359.12 = 6,113.16 : x
  2. Step 2: Convert to fraction form
    20,908.20/31,359.12 = 6,113.16/x
  3. Step 3: Cross multiply
    20,908.20x = 31,359.12 × 6,113.16
  4. Step 4: Simplify right side
    20,908.20x = 191,703,318.02
  5. Step 5: Solve for x
    x = 191,703,318.02/20,908.20
  6. Step 6: Final answer
    x = 9,168.81

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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.