Home / 5,391.81-7,440.80-3,155.31

Finding the Fourth Proportional to 5,391.81, 7,440.80 and 3,155.31

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Solution

The fourth proportional to 5,391.81, 7,440.80 and 3,155.31 is: 4,354.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,391.81 : 7,440.80 = 3,155.31 : x
  2. Step 2: Convert to fraction form
    5,391.81/7,440.80 = 3,155.31/x
  3. Step 3: Cross multiply
    5,391.81x = 7,440.80 × 3,155.31
  4. Step 4: Simplify right side
    5,391.81x = 23,478,014.87
  5. Step 5: Solve for x
    x = 23,478,014.87/5,391.81
  6. Step 6: Final answer
    x = 4,354.38

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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.