Home / 20,547.08-28,354.92-11,115.80

Finding the Fourth Proportional to 20,547.08, 28,354.92 and 11,115.80

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Solution

The fourth proportional to 20,547.08, 28,354.92 and 11,115.80 is: 15,339.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,547.08 : 28,354.92 = 11,115.80 : x
  2. Step 2: Convert to fraction form
    20,547.08/28,354.92 = 11,115.80/x
  3. Step 3: Cross multiply
    20,547.08x = 28,354.92 × 11,115.80
  4. Step 4: Simplify right side
    20,547.08x = 315,187,619.74
  5. Step 5: Solve for x
    x = 315,187,619.74/20,547.08
  6. Step 6: Final answer
    x = 15,339.78

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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.