Home / 20,139.57-27,792.63-11,187.91

Finding the Fourth Proportional to 20,139.57, 27,792.63 and 11,187.91

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Solution

The fourth proportional to 20,139.57, 27,792.63 and 11,187.91 is: 15,439.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.57 : 27,792.63 = 11,187.91 : x
  2. Step 2: Convert to fraction form
    20,139.57/27,792.63 = 11,187.91/x
  3. Step 3: Cross multiply
    20,139.57x = 27,792.63 × 11,187.91
  4. Step 4: Simplify right side
    20,139.57x = 310,941,454.49
  5. Step 5: Solve for x
    x = 310,941,454.49/20,139.57
  6. Step 6: Final answer
    x = 15,439.33

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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.