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Finding the Fourth Proportional to 6,643,781.20, 9,965,671.80 and 1,595,091.70

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Solution

The fourth proportional to 6,643,781.20, 9,965,671.80 and 1,595,091.70 is: 2,392,637.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,643,781.20 : 9,965,671.80 = 1,595,091.70 : x
  2. Step 2: Convert to fraction form
    6,643,781.20/9,965,671.80 = 1,595,091.70/x
  3. Step 3: Cross multiply
    6,643,781.20x = 9,965,671.80 × 1,595,091.70
  4. Step 4: Simplify right side
    6,643,781.20x = 15,896,160,373,104.06
  5. Step 5: Solve for x
    x = 15,896,160,373,104.06/6,643,781.20
  6. Step 6: Final answer
    x = 2,392,637.55

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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.