Home / 3,487.40-5,231.10-2,102.30

Finding the Fourth Proportional to 3,487.40, 5,231.10 and 2,102.30

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Solution

The fourth proportional to 3,487.40, 5,231.10 and 2,102.30 is: 3,153.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,487.40 : 5,231.10 = 2,102.30 : x
  2. Step 2: Convert to fraction form
    3,487.40/5,231.10 = 2,102.30/x
  3. Step 3: Cross multiply
    3,487.40x = 5,231.10 × 2,102.30
  4. Step 4: Simplify right side
    3,487.40x = 10,997,341.53
  5. Step 5: Solve for x
    x = 10,997,341.53/3,487.40
  6. Step 6: Final answer
    x = 3,153.45

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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.