Home / 20,139.65-27,792.72-11,187.98

Finding the Fourth Proportional to 20,139.65, 27,792.72 and 11,187.98

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Solution

The fourth proportional to 20,139.65, 27,792.72 and 11,187.98 is: 15,439.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.65 : 27,792.72 = 11,187.98 : x
  2. Step 2: Convert to fraction form
    20,139.65/27,792.72 = 11,187.98/x
  3. Step 3: Cross multiply
    20,139.65x = 27,792.72 × 11,187.98
  4. Step 4: Simplify right side
    20,139.65x = 310,944,360.76
  5. Step 5: Solve for x
    x = 310,944,360.76/20,139.65
  6. Step 6: Final answer
    x = 15,439.41

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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.