Home / 20,537.20-28,341.32-11,105.80

Finding the Fourth Proportional to 20,537.20, 28,341.32 and 11,105.80

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Solution

The fourth proportional to 20,537.20, 28,341.32 and 11,105.80 is: 15,326.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,537.20 : 28,341.32 = 11,105.80 : x
  2. Step 2: Convert to fraction form
    20,537.20/28,341.32 = 11,105.80/x
  3. Step 3: Cross multiply
    20,537.20x = 28,341.32 × 11,105.80
  4. Step 4: Simplify right side
    20,537.20x = 314,753,031.66
  5. Step 5: Solve for x
    x = 314,753,031.66/20,537.20
  6. Step 6: Final answer
    x = 15,326.00

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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.