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Finding the Fourth Proportional to 28,615.44, 42,909.54 and 8,894.28

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Solution

The fourth proportional to 28,615.44, 42,909.54 and 8,894.28 is: 13,337.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.44 : 42,909.54 = 8,894.28 : x
  2. Step 2: Convert to fraction form
    28,615.44/42,909.54 = 8,894.28/x
  3. Step 3: Cross multiply
    28,615.44x = 42,909.54 × 8,894.28
  4. Step 4: Simplify right side
    28,615.44x = 381,649,463.43
  5. Step 5: Solve for x
    x = 381,649,463.43/28,615.44
  6. Step 6: Final answer
    x = 13,337.19

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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.