Home / 13,181.75-18,171.89-9,398.35

Finding the Fourth Proportional to 13,181.75, 18,171.89 and 9,398.35

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Solution

The fourth proportional to 13,181.75, 18,171.89 and 9,398.35 is: 12,956.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,181.75 : 18,171.89 = 9,398.35 : x
  2. Step 2: Convert to fraction form
    13,181.75/18,171.89 = 9,398.35/x
  3. Step 3: Cross multiply
    13,181.75x = 18,171.89 × 9,398.35
  4. Step 4: Simplify right side
    13,181.75x = 170,785,689.96
  5. Step 5: Solve for x
    x = 170,785,689.96/13,181.75
  6. Step 6: Final answer
    x = 12,956.23

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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.