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Finding the Fourth Proportional to 6,678.79, 9,215.17 and 4,026.31

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Solution

The fourth proportional to 6,678.79, 9,215.17 and 4,026.31 is: 5,555.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,678.79 : 9,215.17 = 4,026.31 : x
  2. Step 2: Convert to fraction form
    6,678.79/9,215.17 = 4,026.31/x
  3. Step 3: Cross multiply
    6,678.79x = 9,215.17 × 4,026.31
  4. Step 4: Simplify right side
    6,678.79x = 37,103,131.12
  5. Step 5: Solve for x
    x = 37,103,131.12/6,678.79
  6. Step 6: Final answer
    x = 5,555.37

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1.5x scale

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.