Home / 21,244.91-31,863.05-20,191.10

Finding the Fourth Proportional to 21,244.91, 31,863.05 and 20,191.10

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Solution

The fourth proportional to 21,244.91, 31,863.05 and 20,191.10 is: 30,282.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,244.91 : 31,863.05 = 20,191.10 : x
  2. Step 2: Convert to fraction form
    21,244.91/31,863.05 = 20,191.10/x
  3. Step 3: Cross multiply
    21,244.91x = 31,863.05 × 20,191.10
  4. Step 4: Simplify right side
    21,244.91x = 643,349,927.90
  5. Step 5: Solve for x
    x = 643,349,927.90/21,244.91
  6. Step 6: Final answer
    x = 30,282.54

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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.