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Finding the Fourth Proportional to 5,898.40, 8,140.22 and 3,905.56

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Solution

The fourth proportional to 5,898.40, 8,140.22 and 3,905.56 is: 5,389.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,898.40 : 8,140.22 = 3,905.56 : x
  2. Step 2: Convert to fraction form
    5,898.40/8,140.22 = 3,905.56/x
  3. Step 3: Cross multiply
    5,898.40x = 8,140.22 × 3,905.56
  4. Step 4: Simplify right side
    5,898.40x = 31,792,117.62
  5. Step 5: Solve for x
    x = 31,792,117.62/5,898.40
  6. Step 6: Final answer
    x = 5,389.96

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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.