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Finding the Third Proportional to 7,140 and 11,212.50

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Solution

The third proportional to 7,140 and 11,212.50 is: 17,607.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140 : 11,212.50 = 11,212.50 : x
  2. Step 2: Convert to fraction form
    7,140/11,212.50 = 11,212.50/x
  3. Step 3: Cross multiply
    7,140x = 11,212.50 × 11,212.50
  4. Step 4: Simplify right side
    7,140x = 125,720,156.25
  5. Step 5: Solve for x
    x = 125,720,156.25/7,140
  6. Step 6: Final answer
    x = 17,607.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.