Home / 20,897.94-31,357.68-13,882.80

Finding the Fourth Proportional to 20,897.94, 31,357.68 and 13,882.80

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Solution

The fourth proportional to 20,897.94, 31,357.68 and 13,882.80 is: 20,831.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,897.94 : 31,357.68 = 13,882.80 : x
  2. Step 2: Convert to fraction form
    20,897.94/31,357.68 = 13,882.80/x
  3. Step 3: Cross multiply
    20,897.94x = 31,357.68 × 13,882.80
  4. Step 4: Simplify right side
    20,897.94x = 435,332,399.90
  5. Step 5: Solve for x
    x = 435,332,399.90/20,897.94
  6. Step 6: Final answer
    x = 20,831.35

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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.