Home / 12,111.20-16,713.56-7,331.25

Finding the Fourth Proportional to 12,111.20, 16,713.56 and 7,331.25

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Solution

The fourth proportional to 12,111.20, 16,713.56 and 7,331.25 is: 10,117.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,111.20 : 16,713.56 = 7,331.25 : x
  2. Step 2: Convert to fraction form
    12,111.20/16,713.56 = 7,331.25/x
  3. Step 3: Cross multiply
    12,111.20x = 16,713.56 × 7,331.25
  4. Step 4: Simplify right side
    12,111.20x = 122,531,305.08
  5. Step 5: Solve for x
    x = 122,531,305.08/12,111.20
  6. Step 6: Final answer
    x = 10,117.19

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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.