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Finding the Fourth Proportional to 7,242.95, 9,990.11 and 6,647.37

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Solution

The fourth proportional to 7,242.95, 9,990.11 and 6,647.37 is: 9,168.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,242.95 : 9,990.11 = 6,647.37 : x
  2. Step 2: Convert to fraction form
    7,242.95/9,990.11 = 6,647.37/x
  3. Step 3: Cross multiply
    7,242.95x = 9,990.11 × 6,647.37
  4. Step 4: Simplify right side
    7,242.95x = 66,407,924.27
  5. Step 5: Solve for x
    x = 66,407,924.27/7,242.95
  6. Step 6: Final answer
    x = 9,168.64

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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.