Home / 20,972.70-28,943.31-13,017.48

Finding the Fourth Proportional to 20,972.70, 28,943.31 and 13,017.48

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Solution

The fourth proportional to 20,972.70, 28,943.31 and 13,017.48 is: 17,964.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.70 : 28,943.31 = 13,017.48 : x
  2. Step 2: Convert to fraction form
    20,972.70/28,943.31 = 13,017.48/x
  3. Step 3: Cross multiply
    20,972.70x = 28,943.31 × 13,017.48
  4. Step 4: Simplify right side
    20,972.70x = 376,768,959.06
  5. Step 5: Solve for x
    x = 376,768,959.06/20,972.70
  6. Step 6: Final answer
    x = 17,964.73

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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.