Home / 6,389.52-8,817.40-3,556.78

Finding the Fourth Proportional to 6,389.52, 8,817.40 and 3,556.78

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Solution

The fourth proportional to 6,389.52, 8,817.40 and 3,556.78 is: 4,908.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,389.52 : 8,817.40 = 3,556.78 : x
  2. Step 2: Convert to fraction form
    6,389.52/8,817.40 = 3,556.78/x
  3. Step 3: Cross multiply
    6,389.52x = 8,817.40 × 3,556.78
  4. Step 4: Simplify right side
    6,389.52x = 31,361,551.97
  5. Step 5: Solve for x
    x = 31,361,551.97/6,389.52
  6. Step 6: Final answer
    x = 4,908.28

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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.