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Finding the Fourth Proportional to 7,172.12, 9,900.90 and 4,786.07

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Solution

The fourth proportional to 7,172.12, 9,900.90 and 4,786.07 is: 6,607.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,172.12 : 9,900.90 = 4,786.07 : x
  2. Step 2: Convert to fraction form
    7,172.12/9,900.90 = 4,786.07/x
  3. Step 3: Cross multiply
    7,172.12x = 9,900.90 × 4,786.07
  4. Step 4: Simplify right side
    7,172.12x = 47,386,350.96
  5. Step 5: Solve for x
    x = 47,386,350.96/7,172.12
  6. Step 6: Final answer
    x = 6,607.02

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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.