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Finding the Fourth Proportional to 15,081.09, 20,811.88 and 8,367.74

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Solution

The fourth proportional to 15,081.09, 20,811.88 and 8,367.74 is: 11,547.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,081.09 : 20,811.88 = 8,367.74 : x
  2. Step 2: Convert to fraction form
    15,081.09/20,811.88 = 8,367.74/x
  3. Step 3: Cross multiply
    15,081.09x = 20,811.88 × 8,367.74
  4. Step 4: Simplify right side
    15,081.09x = 174,148,400.75
  5. Step 5: Solve for x
    x = 174,148,400.75/15,081.09
  6. Step 6: Final answer
    x = 11,547.47

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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.