Home / 21,180.28-29,228.34-11,748.64

Finding the Fourth Proportional to 21,180.28, 29,228.34 and 11,748.64

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Solution

The fourth proportional to 21,180.28, 29,228.34 and 11,748.64 is: 16,212.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.28 : 29,228.34 = 11,748.64 : x
  2. Step 2: Convert to fraction form
    21,180.28/29,228.34 = 11,748.64/x
  3. Step 3: Cross multiply
    21,180.28x = 29,228.34 × 11,748.64
  4. Step 4: Simplify right side
    21,180.28x = 343,393,244.46
  5. Step 5: Solve for x
    x = 343,393,244.46/21,180.28
  6. Step 6: Final answer
    x = 16,212.88

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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.