Home / 20,540.13-28,345.32-11,108.63

Finding the Fourth Proportional to 20,540.13, 28,345.32 and 11,108.63

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Solution

The fourth proportional to 20,540.13, 28,345.32 and 11,108.63 is: 15,329.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.13 : 28,345.32 = 11,108.63 : x
  2. Step 2: Convert to fraction form
    20,540.13/28,345.32 = 11,108.63/x
  3. Step 3: Cross multiply
    20,540.13x = 28,345.32 × 11,108.63
  4. Step 4: Simplify right side
    20,540.13x = 314,877,530.39
  5. Step 5: Solve for x
    x = 314,877,530.39/20,540.13
  6. Step 6: Final answer
    x = 15,329.87

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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.