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Finding the Fourth Proportional to 6,888.78, 9,488.78 and 5,394.03

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Solution

The fourth proportional to 6,888.78, 9,488.78 and 5,394.03 is: 7,429.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,888.78 : 9,488.78 = 5,394.03 : x
  2. Step 2: Convert to fraction form
    6,888.78/9,488.78 = 5,394.03/x
  3. Step 3: Cross multiply
    6,888.78x = 9,488.78 × 5,394.03
  4. Step 4: Simplify right side
    6,888.78x = 51,182,721.66
  5. Step 5: Solve for x
    x = 51,182,721.66/6,888.78
  6. Step 6: Final answer
    x = 7,429.87

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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.