Home / 12,120.48-16,724.90-6,815.18

Finding the Fourth Proportional to 12,120.48, 16,724.90 and 6,815.18

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Solution

The fourth proportional to 12,120.48, 16,724.90 and 6,815.18 is: 9,404.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.48 : 16,724.90 = 6,815.18 : x
  2. Step 2: Convert to fraction form
    12,120.48/16,724.90 = 6,815.18/x
  3. Step 3: Cross multiply
    12,120.48x = 16,724.90 × 6,815.18
  4. Step 4: Simplify right side
    12,120.48x = 113,983,262.83
  5. Step 5: Solve for x
    x = 113,983,262.83/12,120.48
  6. Step 6: Final answer
    x = 9,404.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.