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Finding the Fourth Proportional to 6,986,574.60, 9,641,374.18 and 3,930,781.56

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Solution

The fourth proportional to 6,986,574.60, 9,641,374.18 and 3,930,781.56 is: 5,424,422.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,986,574.60 : 9,641,374.18 = 3,930,781.56 : x
  2. Step 2: Convert to fraction form
    6,986,574.60/9,641,374.18 = 3,930,781.56/x
  3. Step 3: Cross multiply
    6,986,574.60x = 9,641,374.18 × 3,930,781.56
  4. Step 4: Simplify right side
    6,986,574.60x = 37,898,135,839,804.12
  5. Step 5: Solve for x
    x = 37,898,135,839,804.12/6,986,574.60
  6. Step 6: Final answer
    x = 5,424,422.98

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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.