Home / 8,420.54-12,641.75-6,474.11

Finding the Fourth Proportional to 8,420.54, 12,641.75 and 6,474.11

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Solution

The fourth proportional to 8,420.54, 12,641.75 and 6,474.11 is: 9,719.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.54 : 12,641.75 = 6,474.11 : x
  2. Step 2: Convert to fraction form
    8,420.54/12,641.75 = 6,474.11/x
  3. Step 3: Cross multiply
    8,420.54x = 12,641.75 × 6,474.11
  4. Step 4: Simplify right side
    8,420.54x = 81,844,080.09
  5. Step 5: Solve for x
    x = 81,844,080.09/8,420.54
  6. Step 6: Final answer
    x = 9,719.58

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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.