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Finding the Fourth Proportional to 15,080.29, 20,811.98 and 8,367.21

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Solution

The fourth proportional to 15,080.29, 20,811.98 and 8,367.21 is: 11,547.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,080.29 : 20,811.98 = 8,367.21 : x
  2. Step 2: Convert to fraction form
    15,080.29/20,811.98 = 8,367.21/x
  3. Step 3: Cross multiply
    15,080.29x = 20,811.98 × 8,367.21
  4. Step 4: Simplify right side
    15,080.29x = 174,138,207.18
  5. Step 5: Solve for x
    x = 174,138,207.18/15,080.29
  6. Step 6: Final answer
    x = 11,547.40

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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.