Home / 20,920.06-31,377.78-6,129.12

Finding the Fourth Proportional to 20,920.06, 31,377.78 and 6,129.12

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Solution

The fourth proportional to 20,920.06, 31,377.78 and 6,129.12 is: 9,193.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.06 : 31,377.78 = 6,129.12 : x
  2. Step 2: Convert to fraction form
    20,920.06/31,377.78 = 6,129.12/x
  3. Step 3: Cross multiply
    20,920.06x = 31,377.78 × 6,129.12
  4. Step 4: Simplify right side
    20,920.06x = 192,318,178.95
  5. Step 5: Solve for x
    x = 192,318,178.95/20,920.06
  6. Step 6: Final answer
    x = 9,193.00

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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.