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Finding the Fourth Proportional to 28,636.73, 42,944.80 and 9,911.68

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Solution

The fourth proportional to 28,636.73, 42,944.80 and 9,911.68 is: 14,863.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,636.73 : 42,944.80 = 9,911.68 : x
  2. Step 2: Convert to fraction form
    28,636.73/42,944.80 = 9,911.68/x
  3. Step 3: Cross multiply
    28,636.73x = 42,944.80 × 9,911.68
  4. Step 4: Simplify right side
    28,636.73x = 425,655,115.26
  5. Step 5: Solve for x
    x = 425,655,115.26/28,636.73
  6. Step 6: Final answer
    x = 14,863.96

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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.