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Finding the Fourth Proportional to 28,636.55, 42,944.53 and 9,911.50

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Solution

The fourth proportional to 28,636.55, 42,944.53 and 9,911.50 is: 14,863.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,636.55 : 42,944.53 = 9,911.50 : x
  2. Step 2: Convert to fraction form
    28,636.55/42,944.53 = 9,911.50/x
  3. Step 3: Cross multiply
    28,636.55x = 42,944.53 × 9,911.50
  4. Step 4: Simplify right side
    28,636.55x = 425,644,659.54
  5. Step 5: Solve for x
    x = 425,644,659.54/28,636.55
  6. Step 6: Final answer
    x = 14,863.69

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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.