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Finding the Fourth Proportional to 6,315,142.82, 8,712,907.71 and 3,865,199.81

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Solution

The fourth proportional to 6,315,142.82, 8,712,907.71 and 3,865,199.81 is: 5,332,758.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,315,142.82 : 8,712,907.71 = 3,865,199.81 : x
  2. Step 2: Convert to fraction form
    6,315,142.82/8,712,907.71 = 3,865,199.81/x
  3. Step 3: Cross multiply
    6,315,142.82x = 8,712,907.71 × 3,865,199.81
  4. Step 4: Simplify right side
    6,315,142.82x = 33,677,129,181,675
  5. Step 5: Solve for x
    x = 33,677,129,181,675/6,315,142.82
  6. Step 6: Final answer
    x = 5,332,758.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.