Home / 20,963.48-31,438.52-6,920.90

Finding the Fourth Proportional to 20,963.48, 31,438.52 and 6,920.90

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Solution

The fourth proportional to 20,963.48, 31,438.52 and 6,920.90 is: 10,379.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.48 : 31,438.52 = 6,920.90 : x
  2. Step 2: Convert to fraction form
    20,963.48/31,438.52 = 6,920.90/x
  3. Step 3: Cross multiply
    20,963.48x = 31,438.52 × 6,920.90
  4. Step 4: Simplify right side
    20,963.48x = 217,582,853.07
  5. Step 5: Solve for x
    x = 217,582,853.07/20,963.48
  6. Step 6: Final answer
    x = 10,379.14

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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.