Home / 12,115.74-16,721.28-6,810.78

Finding the Fourth Proportional to 12,115.74, 16,721.28 and 6,810.78

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Solution

The fourth proportional to 12,115.74, 16,721.28 and 6,810.78 is: 9,399.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,115.74 : 16,721.28 = 6,810.78 : x
  2. Step 2: Convert to fraction form
    12,115.74/16,721.28 = 6,810.78/x
  3. Step 3: Cross multiply
    12,115.74x = 16,721.28 × 6,810.78
  4. Step 4: Simplify right side
    12,115.74x = 113,884,959.40
  5. Step 5: Solve for x
    x = 113,884,959.40/12,115.74
  6. Step 6: Final answer
    x = 9,399.75

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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.