Home / 8,419.79-12,640.62-6,473.36

Finding the Fourth Proportional to 8,419.79, 12,640.62 and 6,473.36

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Solution

The fourth proportional to 8,419.79, 12,640.62 and 6,473.36 is: 9,718.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,419.79 : 12,640.62 = 6,473.36 : x
  2. Step 2: Convert to fraction form
    8,419.79/12,640.62 = 6,473.36/x
  3. Step 3: Cross multiply
    8,419.79x = 12,640.62 × 6,473.36
  4. Step 4: Simplify right side
    8,419.79x = 81,827,283.88
  5. Step 5: Solve for x
    x = 81,827,283.88/8,419.79
  6. Step 6: Final answer
    x = 9,718.45

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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.