Home / 12,979.85-19,335.81-12,173.09

Finding the Fourth Proportional to 12,979.85, 19,335.81 and 12,173.09

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Solution

The fourth proportional to 12,979.85, 19,335.81 and 12,173.09 is: 18,134.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979.85 : 19,335.81 = 12,173.09 : x
  2. Step 2: Convert to fraction form
    12,979.85/19,335.81 = 12,173.09/x
  3. Step 3: Cross multiply
    12,979.85x = 19,335.81 × 12,173.09
  4. Step 4: Simplify right side
    12,979.85x = 235,376,504.32
  5. Step 5: Solve for x
    x = 235,376,504.32/12,979.85
  6. Step 6: Final answer
    x = 18,134.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.