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Finding the Fourth Proportional to 9,978.76, 14,966.44 and 2,958.60

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Solution

The fourth proportional to 9,978.76, 14,966.44 and 2,958.60 is: 4,437.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,978.76 : 14,966.44 = 2,958.60 : x
  2. Step 2: Convert to fraction form
    9,978.76/14,966.44 = 2,958.60/x
  3. Step 3: Cross multiply
    9,978.76x = 14,966.44 × 2,958.60
  4. Step 4: Simplify right side
    9,978.76x = 44,279,709.38
  5. Step 5: Solve for x
    x = 44,279,709.38/9,978.76
  6. Step 6: Final answer
    x = 4,437.40

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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.