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Finding the Fourth Proportional to 7,284.40, 10,910.40 and 7,122.40

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Solution

The fourth proportional to 7,284.40, 10,910.40 and 7,122.40 is: 10,667.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,284.40 : 10,910.40 = 7,122.40 : x
  2. Step 2: Convert to fraction form
    7,284.40/10,910.40 = 7,122.40/x
  3. Step 3: Cross multiply
    7,284.40x = 10,910.40 × 7,122.40
  4. Step 4: Simplify right side
    7,284.40x = 77,708,232.96
  5. Step 5: Solve for x
    x = 77,708,232.96/7,284.40
  6. Step 6: Final answer
    x = 10,667.76

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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.