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Finding the Fourth Proportional to 9,808.40, 14,707.20 and 3,231.20

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Solution

The fourth proportional to 9,808.40, 14,707.20 and 3,231.20 is: 4,845.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,808.40 : 14,707.20 = 3,231.20 : x
  2. Step 2: Convert to fraction form
    9,808.40/14,707.20 = 3,231.20/x
  3. Step 3: Cross multiply
    9,808.40x = 14,707.20 × 3,231.20
  4. Step 4: Simplify right side
    9,808.40x = 47,521,904.64
  5. Step 5: Solve for x
    x = 47,521,904.64/9,808.40
  6. Step 6: Final answer
    x = 4,845.02

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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.