Home / 18,712.32-28,081.77-10,399.02

Finding the Fourth Proportional to 18,712.32, 28,081.77 and 10,399.02

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Solution

The fourth proportional to 18,712.32, 28,081.77 and 10,399.02 is: 15,605.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.32 : 28,081.77 = 10,399.02 : x
  2. Step 2: Convert to fraction form
    18,712.32/28,081.77 = 10,399.02/x
  3. Step 3: Cross multiply
    18,712.32x = 28,081.77 × 10,399.02
  4. Step 4: Simplify right side
    18,712.32x = 292,022,887.87
  5. Step 5: Solve for x
    x = 292,022,887.87/18,712.32
  6. Step 6: Final answer
    x = 15,605.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.