Home / 20,140.79-27,794.10-11,188.28

Finding the Fourth Proportional to 20,140.79, 27,794.10 and 11,188.28

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Solution

The fourth proportional to 20,140.79, 27,794.10 and 11,188.28 is: 15,439.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.79 : 27,794.10 = 11,188.28 : x
  2. Step 2: Convert to fraction form
    20,140.79/27,794.10 = 11,188.28/x
  3. Step 3: Cross multiply
    20,140.79x = 27,794.10 × 11,188.28
  4. Step 4: Simplify right side
    20,140.79x = 310,968,034.18
  5. Step 5: Solve for x
    x = 310,968,034.18/20,140.79
  6. Step 6: Final answer
    x = 15,439.72

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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.