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Finding the Fourth Proportional to 15,081.43, 20,812.74 and 8,367.34

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Solution

The fourth proportional to 15,081.43, 20,812.74 and 8,367.34 is: 11,547.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,081.43 : 20,812.74 = 8,367.34 : x
  2. Step 2: Convert to fraction form
    15,081.43/20,812.74 = 8,367.34/x
  3. Step 3: Cross multiply
    15,081.43x = 20,812.74 × 8,367.34
  4. Step 4: Simplify right side
    15,081.43x = 174,147,271.91
  5. Step 5: Solve for x
    x = 174,147,271.91/15,081.43
  6. Step 6: Final answer
    x = 11,547.13

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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.