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Finding the Fourth Proportional to 28,615.64, 42,926.22 and 8,888.90

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Solution

The fourth proportional to 28,615.64, 42,926.22 and 8,888.90 is: 13,334.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.64 : 42,926.22 = 8,888.90 : x
  2. Step 2: Convert to fraction form
    28,615.64/42,926.22 = 8,888.90/x
  3. Step 3: Cross multiply
    28,615.64x = 42,926.22 × 8,888.90
  4. Step 4: Simplify right side
    28,615.64x = 381,566,662.33
  5. Step 5: Solve for x
    x = 381,566,662.33/28,615.64
  6. Step 6: Final answer
    x = 13,334.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.