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Finding the Fourth Proportional to 6,738.88, 9,300.40 and 4,086.40

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Solution

The fourth proportional to 6,738.88, 9,300.40 and 4,086.40 is: 5,639.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,738.88 : 9,300.40 = 4,086.40 : x
  2. Step 2: Convert to fraction form
    6,738.88/9,300.40 = 4,086.40/x
  3. Step 3: Cross multiply
    6,738.88x = 9,300.40 × 4,086.40
  4. Step 4: Simplify right side
    6,738.88x = 38,005,154.56
  5. Step 5: Solve for x
    x = 38,005,154.56/6,738.88
  6. Step 6: Final answer
    x = 5,639.68

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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.