Home / 6,920.62-10,382.67-1,990.15

Finding the Fourth Proportional to 6,920.62, 10,382.67 and 1,990.15

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Solution

The fourth proportional to 6,920.62, 10,382.67 and 1,990.15 is: 2,985.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,920.62 : 10,382.67 = 1,990.15 : x
  2. Step 2: Convert to fraction form
    6,920.62/10,382.67 = 1,990.15/x
  3. Step 3: Cross multiply
    6,920.62x = 10,382.67 × 1,990.15
  4. Step 4: Simplify right side
    6,920.62x = 20,663,044.74
  5. Step 5: Solve for x
    x = 20,663,044.74/6,920.62
  6. Step 6: Final answer
    x = 2,985.72

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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.