Home / 21,981.27-30,324.78-13,911.04

Finding the Fourth Proportional to 21,981.27, 30,324.78 and 13,911.04

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Solution

The fourth proportional to 21,981.27, 30,324.78 and 13,911.04 is: 19,191.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.27 : 30,324.78 = 13,911.04 : x
  2. Step 2: Convert to fraction form
    21,981.27/30,324.78 = 13,911.04/x
  3. Step 3: Cross multiply
    21,981.27x = 30,324.78 × 13,911.04
  4. Step 4: Simplify right side
    21,981.27x = 421,849,265.48
  5. Step 5: Solve for x
    x = 421,849,265.48/21,981.27
  6. Step 6: Final answer
    x = 19,191.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.