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Finding the Fourth Proportional to 28,362.60, 42,543.90 and 9,894.60

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Solution

The fourth proportional to 28,362.60, 42,543.90 and 9,894.60 is: 14,841.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362.60 : 42,543.90 = 9,894.60 : x
  2. Step 2: Convert to fraction form
    28,362.60/42,543.90 = 9,894.60/x
  3. Step 3: Cross multiply
    28,362.60x = 42,543.90 × 9,894.60
  4. Step 4: Simplify right side
    28,362.60x = 420,954,872.94
  5. Step 5: Solve for x
    x = 420,954,872.94/28,362.60
  6. Step 6: Final answer
    x = 14,841.90

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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.