Home / 5,430.70-8,142.40-2,142.10

Finding the Fourth Proportional to 5,430.70, 8,142.40 and 2,142.10

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Solution

The fourth proportional to 5,430.70, 8,142.40 and 2,142.10 is: 3,211.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,430.70 : 8,142.40 = 2,142.10 : x
  2. Step 2: Convert to fraction form
    5,430.70/8,142.40 = 2,142.10/x
  3. Step 3: Cross multiply
    5,430.70x = 8,142.40 × 2,142.10
  4. Step 4: Simplify right side
    5,430.70x = 17,441,835.04
  5. Step 5: Solve for x
    x = 17,441,835.04/5,430.70
  6. Step 6: Final answer
    x = 3,211.71

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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.