Home / 20,219.56-27,885.54-13,143.40

Finding the Fourth Proportional to 20,219.56, 27,885.54 and 13,143.40

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Solution

The fourth proportional to 20,219.56, 27,885.54 and 13,143.40 is: 18,126.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219.56 : 27,885.54 = 13,143.40 : x
  2. Step 2: Convert to fraction form
    20,219.56/27,885.54 = 13,143.40/x
  3. Step 3: Cross multiply
    20,219.56x = 27,885.54 × 13,143.40
  4. Step 4: Simplify right side
    20,219.56x = 366,510,806.44
  5. Step 5: Solve for x
    x = 366,510,806.44/20,219.56
  6. Step 6: Final answer
    x = 18,126.55

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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.