Home / 21,284.91-31,934.25-13,903.80

Finding the Fourth Proportional to 21,284.91, 31,934.25 and 13,903.80

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Solution

The fourth proportional to 21,284.91, 31,934.25 and 13,903.80 is: 20,860.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,284.91 : 31,934.25 = 13,903.80 : x
  2. Step 2: Convert to fraction form
    21,284.91/31,934.25 = 13,903.80/x
  3. Step 3: Cross multiply
    21,284.91x = 31,934.25 × 13,903.80
  4. Step 4: Simplify right side
    21,284.91x = 444,007,425.15
  5. Step 5: Solve for x
    x = 444,007,425.15/21,284.91
  6. Step 6: Final answer
    x = 20,860.20

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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.