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Finding the Third Proportional to 7,312 and 10,421

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Solution

The third proportional to 7,312 and 10,421 is: 14,851.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,312 : 10,421 = 10,421 : x
  2. Step 2: Convert to fraction form
    7,312/10,421 = 10,421/x
  3. Step 3: Cross multiply
    7,312x = 10,421 × 10,421
  4. Step 4: Simplify right side
    7,312x = 108,597,241
  5. Step 5: Solve for x
    x = 108,597,241/7,312
  6. Step 6: Final answer
    x = 14,851.92

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.