Home / 20,392.56-28,143.02-11,440.64

Finding the Fourth Proportional to 20,392.56, 28,143.02 and 11,440.64

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Solution

The fourth proportional to 20,392.56, 28,143.02 and 11,440.64 is: 15,788.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.56 : 28,143.02 = 11,440.64 : x
  2. Step 2: Convert to fraction form
    20,392.56/28,143.02 = 11,440.64/x
  3. Step 3: Cross multiply
    20,392.56x = 28,143.02 × 11,440.64
  4. Step 4: Simplify right side
    20,392.56x = 321,974,160.33
  5. Step 5: Solve for x
    x = 321,974,160.33/20,392.56
  6. Step 6: Final answer
    x = 15,788.81

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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.