Home / 12,116.40-16,721.40-6,811.56

Finding the Fourth Proportional to 12,116.40, 16,721.40 and 6,811.56

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Solution

The fourth proportional to 12,116.40, 16,721.40 and 6,811.56 is: 9,400.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,116.40 : 16,721.40 = 6,811.56 : x
  2. Step 2: Convert to fraction form
    12,116.40/16,721.40 = 6,811.56/x
  3. Step 3: Cross multiply
    12,116.40x = 16,721.40 × 6,811.56
  4. Step 4: Simplify right side
    12,116.40x = 113,898,819.38
  5. Step 5: Solve for x
    x = 113,898,819.38/12,116.40
  6. Step 6: Final answer
    x = 9,400.38

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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.