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Finding the Fourth Proportional to 7,318.35, 10,978.29 and 2,124.23

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Solution

The fourth proportional to 7,318.35, 10,978.29 and 2,124.23 is: 3,186.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,318.35 : 10,978.29 = 2,124.23 : x
  2. Step 2: Convert to fraction form
    7,318.35/10,978.29 = 2,124.23/x
  3. Step 3: Cross multiply
    7,318.35x = 10,978.29 × 2,124.23
  4. Step 4: Simplify right side
    7,318.35x = 23,320,358.08
  5. Step 5: Solve for x
    x = 23,320,358.08/7,318.35
  6. Step 6: Final answer
    x = 3,186.56

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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.