Home / 20,278.40-27,968.12-12,320.46

Finding the Fourth Proportional to 20,278.40, 27,968.12 and 12,320.46

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Solution

The fourth proportional to 20,278.40, 27,968.12 and 12,320.46 is: 16,992.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.40 : 27,968.12 = 12,320.46 : x
  2. Step 2: Convert to fraction form
    20,278.40/27,968.12 = 12,320.46/x
  3. Step 3: Cross multiply
    20,278.40x = 27,968.12 × 12,320.46
  4. Step 4: Simplify right side
    20,278.40x = 344,580,103.74
  5. Step 5: Solve for x
    x = 344,580,103.74/20,278.40
  6. Step 6: Final answer
    x = 16,992.47

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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.