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Finding the Third Proportional to 21,210.75 and 36,220.50

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Solution

The third proportional to 21,210.75 and 36,220.50 is: 61,851.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.75 : 36,220.50 = 36,220.50 : x
  2. Step 2: Convert to fraction form
    21,210.75/36,220.50 = 36,220.50/x
  3. Step 3: Cross multiply
    21,210.75x = 36,220.50 × 36,220.50
  4. Step 4: Simplify right side
    21,210.75x = 1,311,924,620.25
  5. Step 5: Solve for x
    x = 1,311,924,620.25/21,210.75
  6. Step 6: Final answer
    x = 61,851.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.