Home / 20,687.75-28,549.28-11,256.11

Finding the Fourth Proportional to 20,687.75, 28,549.28 and 11,256.11

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Solution

The fourth proportional to 20,687.75, 28,549.28 and 11,256.11 is: 15,533.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.75 : 28,549.28 = 11,256.11 : x
  2. Step 2: Convert to fraction form
    20,687.75/28,549.28 = 11,256.11/x
  3. Step 3: Cross multiply
    20,687.75x = 28,549.28 × 11,256.11
  4. Step 4: Simplify right side
    20,687.75x = 321,353,786.34
  5. Step 5: Solve for x
    x = 321,353,786.34/20,687.75
  6. Step 6: Final answer
    x = 15,533.53

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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.