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Finding the Fourth Proportional to 28,332.40, 42,500.12 and 8,611.60

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Solution

The fourth proportional to 28,332.40, 42,500.12 and 8,611.60 is: 12,917.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,332.40 : 42,500.12 = 8,611.60 : x
  2. Step 2: Convert to fraction form
    28,332.40/42,500.12 = 8,611.60/x
  3. Step 3: Cross multiply
    28,332.40x = 42,500.12 × 8,611.60
  4. Step 4: Simplify right side
    28,332.40x = 365,994,033.39
  5. Step 5: Solve for x
    x = 365,994,033.39/28,332.40
  6. Step 6: Final answer
    x = 12,917.86

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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.