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Finding the Fourth Proportional to 11,421.95, 17,126.07 and 4,750.42

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Solution

The fourth proportional to 11,421.95, 17,126.07 and 4,750.42 is: 7,122.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,421.95 : 17,126.07 = 4,750.42 : x
  2. Step 2: Convert to fraction form
    11,421.95/17,126.07 = 4,750.42/x
  3. Step 3: Cross multiply
    11,421.95x = 17,126.07 × 4,750.42
  4. Step 4: Simplify right side
    11,421.95x = 81,356,065.14
  5. Step 5: Solve for x
    x = 81,356,065.14/11,421.95
  6. Step 6: Final answer
    x = 7,122.78

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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.