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Finding the Fourth Proportional to 15,805.99, 21,812.19 and 8,732.41

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Solution

The fourth proportional to 15,805.99, 21,812.19 and 8,732.41 is: 12,050.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,805.99 : 21,812.19 = 8,732.41 : x
  2. Step 2: Convert to fraction form
    15,805.99/21,812.19 = 8,732.41/x
  3. Step 3: Cross multiply
    15,805.99x = 21,812.19 × 8,732.41
  4. Step 4: Simplify right side
    15,805.99x = 190,472,986.08
  5. Step 5: Solve for x
    x = 190,472,986.08/15,805.99
  6. Step 6: Final answer
    x = 12,050.68

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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.