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Finding the Fourth Proportional to 30,772.20, 42,993.60 and 30,772.20

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Solution

The fourth proportional to 30,772.20, 42,993.60 and 30,772.20 is: 42,993.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,772.20 : 42,993.60 = 30,772.20 : x
  2. Step 2: Convert to fraction form
    30,772.20/42,993.60 = 30,772.20/x
  3. Step 3: Cross multiply
    30,772.20x = 42,993.60 × 30,772.20
  4. Step 4: Simplify right side
    30,772.20x = 1,323,007,657.92
  5. Step 5: Solve for x
    x = 1,323,007,657.92/30,772.20
  6. Step 6: Final answer
    x = 42,993.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.