Home / 6,920.90-10,381.30-1,990.52

Finding the Fourth Proportional to 6,920.90, 10,381.30 and 1,990.52

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Solution

The fourth proportional to 6,920.90, 10,381.30 and 1,990.52 is: 2,985.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,920.90 : 10,381.30 = 1,990.52 : x
  2. Step 2: Convert to fraction form
    6,920.90/10,381.30 = 1,990.52/x
  3. Step 3: Cross multiply
    6,920.90x = 10,381.30 × 1,990.52
  4. Step 4: Simplify right side
    6,920.90x = 20,664,206.25
  5. Step 5: Solve for x
    x = 20,664,206.25/6,920.90
  6. Step 6: Final answer
    x = 2,985.77

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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.