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Finding the Fourth Proportional to 10,662.22, 15,990.90 and 4,820.50

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Solution

The fourth proportional to 10,662.22, 15,990.90 and 4,820.50 is: 7,229.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,662.22 : 15,990.90 = 4,820.50 : x
  2. Step 2: Convert to fraction form
    10,662.22/15,990.90 = 4,820.50/x
  3. Step 3: Cross multiply
    10,662.22x = 15,990.90 × 4,820.50
  4. Step 4: Simplify right side
    10,662.22x = 77,084,133.45
  5. Step 5: Solve for x
    x = 77,084,133.45/10,662.22
  6. Step 6: Final answer
    x = 7,229.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.