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Finding the Fourth Proportional to 18,772.61, 25,915.55 and 10,813.28

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Solution

The fourth proportional to 18,772.61, 25,915.55 and 10,813.28 is: 14,927.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,772.61 : 25,915.55 = 10,813.28 : x
  2. Step 2: Convert to fraction form
    18,772.61/25,915.55 = 10,813.28/x
  3. Step 3: Cross multiply
    18,772.61x = 25,915.55 × 10,813.28
  4. Step 4: Simplify right side
    18,772.61x = 280,231,914.86
  5. Step 5: Solve for x
    x = 280,231,914.86/18,772.61
  6. Step 6: Final answer
    x = 14,927.71

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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.