Home / 21,180.07-31,720.01-18,391.59

Finding the Fourth Proportional to 21,180.07, 31,720.01 and 18,391.59

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Solution

The fourth proportional to 21,180.07, 31,720.01 and 18,391.59 is: 27,543.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.07 : 31,720.01 = 18,391.59 : x
  2. Step 2: Convert to fraction form
    21,180.07/31,720.01 = 18,391.59/x
  3. Step 3: Cross multiply
    21,180.07x = 31,720.01 × 18,391.59
  4. Step 4: Simplify right side
    21,180.07x = 583,381,276.78
  5. Step 5: Solve for x
    x = 583,381,276.78/21,180.07
  6. Step 6: Final answer
    x = 27,543.88

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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.