Home / 20,378.31-28,127.07-12,424.92

Finding the Fourth Proportional to 20,378.31, 28,127.07 and 12,424.92

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Solution

The fourth proportional to 20,378.31, 28,127.07 and 12,424.92 is: 17,149.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.31 : 28,127.07 = 12,424.92 : x
  2. Step 2: Convert to fraction form
    20,378.31/28,127.07 = 12,424.92/x
  3. Step 3: Cross multiply
    20,378.31x = 28,127.07 × 12,424.92
  4. Step 4: Simplify right side
    20,378.31x = 349,476,594.58
  5. Step 5: Solve for x
    x = 349,476,594.58/20,378.31
  6. Step 6: Final answer
    x = 17,149.44

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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.