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Finding the Fourth Proportional to 9,909.12, 14,866.14 and 3,986.40

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Solution

The fourth proportional to 9,909.12, 14,866.14 and 3,986.40 is: 5,980.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,909.12 : 14,866.14 = 3,986.40 : x
  2. Step 2: Convert to fraction form
    9,909.12/14,866.14 = 3,986.40/x
  3. Step 3: Cross multiply
    9,909.12x = 14,866.14 × 3,986.40
  4. Step 4: Simplify right side
    9,909.12x = 59,262,380.50
  5. Step 5: Solve for x
    x = 59,262,380.50/9,909.12
  6. Step 6: Final answer
    x = 5,980.59

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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.