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Finding the Fourth Proportional to 15,081.58, 20,812.71 and 8,367.65

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Solution

The fourth proportional to 15,081.58, 20,812.71 and 8,367.65 is: 11,547.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,081.58 : 20,812.71 = 8,367.65 : x
  2. Step 2: Convert to fraction form
    15,081.58/20,812.71 = 8,367.65/x
  3. Step 3: Cross multiply
    15,081.58x = 20,812.71 × 8,367.65
  4. Step 4: Simplify right side
    15,081.58x = 174,153,326.93
  5. Step 5: Solve for x
    x = 174,153,326.93/15,081.58
  6. Step 6: Final answer
    x = 11,547.42

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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.