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Finding the Fourth Proportional to 7,155.89, 9,873.11 and 4,638.11

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Solution

The fourth proportional to 7,155.89, 9,873.11 and 4,638.11 is: 6,399.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155.89 : 9,873.11 = 4,638.11 : x
  2. Step 2: Convert to fraction form
    7,155.89/9,873.11 = 4,638.11/x
  3. Step 3: Cross multiply
    7,155.89x = 9,873.11 × 4,638.11
  4. Step 4: Simplify right side
    7,155.89x = 45,792,596.68
  5. Step 5: Solve for x
    x = 45,792,596.68/7,155.89
  6. Step 6: Final answer
    x = 6,399.28

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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.