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Finding the Fourth Proportional to 11,172, 15,418.16 and 6,459.01

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Solution

The fourth proportional to 11,172, 15,418.16 and 6,459.01 is: 8,913.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,172 : 15,418.16 = 6,459.01 : x
  2. Step 2: Convert to fraction form
    11,172/15,418.16 = 6,459.01/x
  3. Step 3: Cross multiply
    11,172x = 15,418.16 × 6,459.01
  4. Step 4: Simplify right side
    11,172x = 99,586,049.62
  5. Step 5: Solve for x
    x = 99,586,049.62/11,172
  6. Step 6: Final answer
    x = 8,913.90

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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.