Home / 18,120.09-24,995.11-11,395.05

Finding the Fourth Proportional to 18,120.09, 24,995.11 and 11,395.05

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Solution

The fourth proportional to 18,120.09, 24,995.11 and 11,395.05 is: 15,718.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,120.09 : 24,995.11 = 11,395.05 : x
  2. Step 2: Convert to fraction form
    18,120.09/24,995.11 = 11,395.05/x
  3. Step 3: Cross multiply
    18,120.09x = 24,995.11 × 11,395.05
  4. Step 4: Simplify right side
    18,120.09x = 284,820,471.23
  5. Step 5: Solve for x
    x = 284,820,471.23/18,120.09
  6. Step 6: Final answer
    x = 15,718.49

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Double scale
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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.