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Finding the Third Proportional to 15,531.75 and 21,087.84

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Solution

The third proportional to 15,531.75 and 21,087.84 is: 28,631.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,531.75 : 21,087.84 = 21,087.84 : x
  2. Step 2: Convert to fraction form
    15,531.75/21,087.84 = 21,087.84/x
  3. Step 3: Cross multiply
    15,531.75x = 21,087.84 × 21,087.84
  4. Step 4: Simplify right side
    15,531.75x = 444,697,154.02
  5. Step 5: Solve for x
    x = 444,697,154.02/15,531.75
  6. Step 6: Final answer
    x = 28,631.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.