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Finding the Fourth Proportional to 15,223.92, 21,008.97 and 8,509.55

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Solution

The fourth proportional to 15,223.92, 21,008.97 and 8,509.55 is: 11,743.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,223.92 : 21,008.97 = 8,509.55 : x
  2. Step 2: Convert to fraction form
    15,223.92/21,008.97 = 8,509.55/x
  3. Step 3: Cross multiply
    15,223.92x = 21,008.97 × 8,509.55
  4. Step 4: Simplify right side
    15,223.92x = 178,776,775.62
  5. Step 5: Solve for x
    x = 178,776,775.62/15,223.92
  6. Step 6: Final answer
    x = 11,743.15

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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.