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Finding the Fourth Proportional to 7,172.75, 10,776.03 and 4,218.76

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Solution

The fourth proportional to 7,172.75, 10,776.03 and 4,218.76 is: 6,338.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,172.75 : 10,776.03 = 4,218.76 : x
  2. Step 2: Convert to fraction form
    7,172.75/10,776.03 = 4,218.76/x
  3. Step 3: Cross multiply
    7,172.75x = 10,776.03 × 4,218.76
  4. Step 4: Simplify right side
    7,172.75x = 45,461,457.38
  5. Step 5: Solve for x
    x = 45,461,457.38/7,172.75
  6. Step 6: Final answer
    x = 6,338.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.