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Finding the Fourth Proportional to 6,645.12, 9,971.60 and 2,428.00

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Solution

The fourth proportional to 6,645.12, 9,971.60 and 2,428.00 is: 3,643.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,645.12 : 9,971.60 = 2,428.00 : x
  2. Step 2: Convert to fraction form
    6,645.12/9,971.60 = 2,428.00/x
  3. Step 3: Cross multiply
    6,645.12x = 9,971.60 × 2,428.00
  4. Step 4: Simplify right side
    6,645.12x = 24,211,001.01
  5. Step 5: Solve for x
    x = 24,211,001.01/6,645.12
  6. Step 6: Final answer
    x = 3,643.43

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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.