Home / 20,547.20-28,355.07-11,115.77

Finding the Fourth Proportional to 20,547.20, 28,355.07 and 11,115.77

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Solution

The fourth proportional to 20,547.20, 28,355.07 and 11,115.77 is: 15,339.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,547.20 : 28,355.07 = 11,115.77 : x
  2. Step 2: Convert to fraction form
    20,547.20/28,355.07 = 11,115.77/x
  3. Step 3: Cross multiply
    20,547.20x = 28,355.07 × 11,115.77
  4. Step 4: Simplify right side
    20,547.20x = 315,188,294.68
  5. Step 5: Solve for x
    x = 315,188,294.68/20,547.20
  6. Step 6: Final answer
    x = 15,339.72

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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.