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Finding the Fourth Proportional to 15,886.94, 21,926.60 and 8,815.64

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Solution

The fourth proportional to 15,886.94, 21,926.60 and 8,815.64 is: 12,167.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,886.94 : 21,926.60 = 8,815.64 : x
  2. Step 2: Convert to fraction form
    15,886.94/21,926.60 = 8,815.64/x
  3. Step 3: Cross multiply
    15,886.94x = 21,926.60 × 8,815.64
  4. Step 4: Simplify right side
    15,886.94x = 193,297,012.02
  5. Step 5: Solve for x
    x = 193,297,012.02/15,886.94
  6. Step 6: Final answer
    x = 12,167.04

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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.