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Finding the Fourth Proportional to 11,328.68, 15,629.22 and 8,351.60

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Solution

The fourth proportional to 11,328.68, 15,629.22 and 8,351.60 is: 11,521.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,328.68 : 15,629.22 = 8,351.60 : x
  2. Step 2: Convert to fraction form
    11,328.68/15,629.22 = 8,351.60/x
  3. Step 3: Cross multiply
    11,328.68x = 15,629.22 × 8,351.60
  4. Step 4: Simplify right side
    11,328.68x = 130,528,915.61
  5. Step 5: Solve for x
    x = 130,528,915.61/11,328.68
  6. Step 6: Final answer
    x = 11,521.99

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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.