Home / 6,440.81-8,868.57-5,639.55

Finding the Fourth Proportional to 6,440.81, 8,868.57 and 5,639.55

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Solution

The fourth proportional to 6,440.81, 8,868.57 and 5,639.55 is: 7,765.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,440.81 : 8,868.57 = 5,639.55 : x
  2. Step 2: Convert to fraction form
    6,440.81/8,868.57 = 5,639.55/x
  3. Step 3: Cross multiply
    6,440.81x = 8,868.57 × 5,639.55
  4. Step 4: Simplify right side
    6,440.81x = 50,014,743.94
  5. Step 5: Solve for x
    x = 50,014,743.94/6,440.81
  6. Step 6: Final answer
    x = 7,765.29

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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.