Home / 8,705.40-12,015.91-5,171.10

Finding the Fourth Proportional to 8,705.40, 12,015.91 and 5,171.10

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Solution

The fourth proportional to 8,705.40, 12,015.91 and 5,171.10 is: 7,137.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,705.40 : 12,015.91 = 5,171.10 : x
  2. Step 2: Convert to fraction form
    8,705.40/12,015.91 = 5,171.10/x
  3. Step 3: Cross multiply
    8,705.40x = 12,015.91 × 5,171.10
  4. Step 4: Simplify right side
    8,705.40x = 62,135,472.20
  5. Step 5: Solve for x
    x = 62,135,472.20/8,705.40
  6. Step 6: Final answer
    x = 7,137.58

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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.