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Finding the Third Proportional to 7,478 and 14,578

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Solution

The third proportional to 7,478 and 14,578 is: 28,419.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478 : 14,578 = 14,578 : x
  2. Step 2: Convert to fraction form
    7,478/14,578 = 14,578/x
  3. Step 3: Cross multiply
    7,478x = 14,578 × 14,578
  4. Step 4: Simplify right side
    7,478x = 212,518,084
  5. Step 5: Solve for x
    x = 212,518,084/7,478
  6. Step 6: Final answer
    x = 28,419.11

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Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.