Home / 12,116.40-16,719.48-7,081.80

Finding the Fourth Proportional to 12,116.40, 16,719.48 and 7,081.80

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Solution

The fourth proportional to 12,116.40, 16,719.48 and 7,081.80 is: 9,772.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,116.40 : 16,719.48 = 7,081.80 : x
  2. Step 2: Convert to fraction form
    12,116.40/16,719.48 = 7,081.80/x
  3. Step 3: Cross multiply
    12,116.40x = 16,719.48 × 7,081.80
  4. Step 4: Simplify right side
    12,116.40x = 118,404,013.46
  5. Step 5: Solve for x
    x = 118,404,013.46/12,116.40
  6. Step 6: Final answer
    x = 9,772.21

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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.