Home / 20,943.02-28,881.42-13,760.21

Finding the Fourth Proportional to 20,943.02, 28,881.42 and 13,760.21

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Solution

The fourth proportional to 20,943.02, 28,881.42 and 13,760.21 is: 18,975.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.02 : 28,881.42 = 13,760.21 : x
  2. Step 2: Convert to fraction form
    20,943.02/28,881.42 = 13,760.21/x
  3. Step 3: Cross multiply
    20,943.02x = 28,881.42 × 13,760.21
  4. Step 4: Simplify right side
    20,943.02x = 397,414,404.30
  5. Step 5: Solve for x
    x = 397,414,404.30/20,943.02
  6. Step 6: Final answer
    x = 18,975.98

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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.