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Finding the Fourth Proportional to 9,967.76, 14,945.40 and 4,420.88

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Solution

The fourth proportional to 9,967.76, 14,945.40 and 4,420.88 is: 6,628.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,967.76 : 14,945.40 = 4,420.88 : x
  2. Step 2: Convert to fraction form
    9,967.76/14,945.40 = 4,420.88/x
  3. Step 3: Cross multiply
    9,967.76x = 14,945.40 × 4,420.88
  4. Step 4: Simplify right side
    9,967.76x = 66,071,819.95
  5. Step 5: Solve for x
    x = 66,071,819.95/9,967.76
  6. Step 6: Final answer
    x = 6,628.55

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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.