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Finding the Fourth Proportional to 28,607.60, 42,911.80 and 8,884.91

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Solution

The fourth proportional to 28,607.60, 42,911.80 and 8,884.91 is: 13,327.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,607.60 : 42,911.80 = 8,884.91 : x
  2. Step 2: Convert to fraction form
    28,607.60/42,911.80 = 8,884.91/x
  3. Step 3: Cross multiply
    28,607.60x = 42,911.80 × 8,884.91
  4. Step 4: Simplify right side
    28,607.60x = 381,267,480.94
  5. Step 5: Solve for x
    x = 381,267,480.94/28,607.60
  6. Step 6: Final answer
    x = 13,327.49

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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.