Home / 21,505.64-29,687.46-20,667.56

Finding the Fourth Proportional to 21,505.64, 29,687.46 and 20,667.56

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Solution

The fourth proportional to 21,505.64, 29,687.46 and 20,667.56 is: 28,530.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,505.64 : 29,687.46 = 20,667.56 : x
  2. Step 2: Convert to fraction form
    21,505.64/29,687.46 = 20,667.56/x
  3. Step 3: Cross multiply
    21,505.64x = 29,687.46 × 20,667.56
  4. Step 4: Simplify right side
    21,505.64x = 613,567,360.80
  5. Step 5: Solve for x
    x = 613,567,360.80/21,505.64
  6. Step 6: Final answer
    x = 28,530.53

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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.