Home / 21,050.28-29,174.88-20,656.64

Finding the Fourth Proportional to 21,050.28, 29,174.88 and 20,656.64

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Solution

The fourth proportional to 21,050.28, 29,174.88 and 20,656.64 is: 28,629.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,050.28 : 29,174.88 = 20,656.64 : x
  2. Step 2: Convert to fraction form
    21,050.28/29,174.88 = 20,656.64/x
  3. Step 3: Cross multiply
    21,050.28x = 29,174.88 × 20,656.64
  4. Step 4: Simplify right side
    21,050.28x = 602,654,993.20
  5. Step 5: Solve for x
    x = 602,654,993.20/21,050.28
  6. Step 6: Final answer
    x = 28,629.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.