Home / 20,687.76-28,548.72-11,256.12

Finding the Fourth Proportional to 20,687.76, 28,548.72 and 11,256.12

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Solution

The fourth proportional to 20,687.76, 28,548.72 and 11,256.12 is: 15,533.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.76 : 28,548.72 = 11,256.12 : x
  2. Step 2: Convert to fraction form
    20,687.76/28,548.72 = 11,256.12/x
  3. Step 3: Cross multiply
    20,687.76x = 28,548.72 × 11,256.12
  4. Step 4: Simplify right side
    20,687.76x = 321,347,818.17
  5. Step 5: Solve for x
    x = 321,347,818.17/20,687.76
  6. Step 6: Final answer
    x = 15,533.23

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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.