Home / 5,487.40-8,231.10-3,420.55

Finding the Fourth Proportional to 5,487.40, 8,231.10 and 3,420.55

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Solution

The fourth proportional to 5,487.40, 8,231.10 and 3,420.55 is: 5,130.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,487.40 : 8,231.10 = 3,420.55 : x
  2. Step 2: Convert to fraction form
    5,487.40/8,231.10 = 3,420.55/x
  3. Step 3: Cross multiply
    5,487.40x = 8,231.10 × 3,420.55
  4. Step 4: Simplify right side
    5,487.40x = 28,154,889.11
  5. Step 5: Solve for x
    x = 28,154,889.11/5,487.40
  6. Step 6: Final answer
    x = 5,130.83

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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.