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Finding the Third Proportional to 7,020 and 11,319.75

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Solution

The third proportional to 7,020 and 11,319.75 is: 18,253.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,020 : 11,319.75 = 11,319.75 : x
  2. Step 2: Convert to fraction form
    7,020/11,319.75 = 11,319.75/x
  3. Step 3: Cross multiply
    7,020x = 11,319.75 × 11,319.75
  4. Step 4: Simplify right side
    7,020x = 128,136,740.06
  5. Step 5: Solve for x
    x = 128,136,740.06/7,020
  6. Step 6: Final answer
    x = 18,253.10

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.