Home / 12,681.73-18,998.38-7,118.20

Finding the Fourth Proportional to 12,681.73, 18,998.38 and 7,118.20

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Solution

The fourth proportional to 12,681.73, 18,998.38 and 7,118.20 is: 10,663.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,681.73 : 18,998.38 = 7,118.20 : x
  2. Step 2: Convert to fraction form
    12,681.73/18,998.38 = 7,118.20/x
  3. Step 3: Cross multiply
    12,681.73x = 18,998.38 × 7,118.20
  4. Step 4: Simplify right side
    12,681.73x = 135,234,137.93
  5. Step 5: Solve for x
    x = 135,234,137.93/12,681.73
  6. Step 6: Final answer
    x = 10,663.70

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1.5x scale

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.