Home / 20,139.24-27,802.25-12,589.77

Finding the Fourth Proportional to 20,139.24, 27,802.25 and 12,589.77

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Solution

The fourth proportional to 20,139.24, 27,802.25 and 12,589.77 is: 17,380.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.24 : 27,802.25 = 12,589.77 : x
  2. Step 2: Convert to fraction form
    20,139.24/27,802.25 = 12,589.77/x
  3. Step 3: Cross multiply
    20,139.24x = 27,802.25 × 12,589.77
  4. Step 4: Simplify right side
    20,139.24x = 350,023,731.02
  5. Step 5: Solve for x
    x = 350,023,731.02/20,139.24
  6. Step 6: Final answer
    x = 17,380.19

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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.