Home / 21,022.96-29,013.75-15,708.55

Finding the Fourth Proportional to 21,022.96, 29,013.75 and 15,708.55

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Solution

The fourth proportional to 21,022.96, 29,013.75 and 15,708.55 is: 21,679.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.96 : 29,013.75 = 15,708.55 : x
  2. Step 2: Convert to fraction form
    21,022.96/29,013.75 = 15,708.55/x
  3. Step 3: Cross multiply
    21,022.96x = 29,013.75 × 15,708.55
  4. Step 4: Simplify right side
    21,022.96x = 455,763,942.56
  5. Step 5: Solve for x
    x = 455,763,942.56/21,022.96
  6. Step 6: Final answer
    x = 21,679.34

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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.