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Finding the Fourth Proportional to 15,002.71, 20,707.74 and 8,629.99

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Solution

The fourth proportional to 15,002.71, 20,707.74 and 8,629.99 is: 11,911.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,002.71 : 20,707.74 = 8,629.99 : x
  2. Step 2: Convert to fraction form
    15,002.71/20,707.74 = 8,629.99/x
  3. Step 3: Cross multiply
    15,002.71x = 20,707.74 × 8,629.99
  4. Step 4: Simplify right side
    15,002.71x = 178,707,589.12
  5. Step 5: Solve for x
    x = 178,707,589.12/15,002.71
  6. Step 6: Final answer
    x = 11,911.69

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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.