Home / 20,547.32-28,355.10-11,115.68

Finding the Fourth Proportional to 20,547.32, 28,355.10 and 11,115.68

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Solution

The fourth proportional to 20,547.32, 28,355.10 and 11,115.68 is: 15,339.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,547.32 : 28,355.10 = 11,115.68 : x
  2. Step 2: Convert to fraction form
    20,547.32/28,355.10 = 11,115.68/x
  3. Step 3: Cross multiply
    20,547.32x = 28,355.10 × 11,115.68
  4. Step 4: Simplify right side
    20,547.32x = 315,186,217.97
  5. Step 5: Solve for x
    x = 315,186,217.97/20,547.32
  6. Step 6: Final answer
    x = 15,339.53

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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.