Home / 21,279.38-31,919.07-5,697

Finding the Fourth Proportional to 21,279.38, 31,919.07 and 5,697

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Solution

The fourth proportional to 21,279.38, 31,919.07 and 5,697 is: 8,545.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.38 : 31,919.07 = 5,697 : x
  2. Step 2: Convert to fraction form
    21,279.38/31,919.07 = 5,697/x
  3. Step 3: Cross multiply
    21,279.38x = 31,919.07 × 5,697
  4. Step 4: Simplify right side
    21,279.38x = 181,842,941.79
  5. Step 5: Solve for x
    x = 181,842,941.79/21,279.38
  6. Step 6: Final answer
    x = 8,545.50

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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.