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Finding the Fourth Proportional to 9,989.76, 14,980.20 and 3,062.64

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Solution

The fourth proportional to 9,989.76, 14,980.20 and 3,062.64 is: 4,592.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989.76 : 14,980.20 = 3,062.64 : x
  2. Step 2: Convert to fraction form
    9,989.76/14,980.20 = 3,062.64/x
  3. Step 3: Cross multiply
    9,989.76x = 14,980.20 × 3,062.64
  4. Step 4: Simplify right side
    9,989.76x = 45,878,959.73
  5. Step 5: Solve for x
    x = 45,878,959.73/9,989.76
  6. Step 6: Final answer
    x = 4,592.60

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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.