Home / 5,430.25-8,141.64-2,143.72

Finding the Fourth Proportional to 5,430.25, 8,141.64 and 2,143.72

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Solution

The fourth proportional to 5,430.25, 8,141.64 and 2,143.72 is: 3,214.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,430.25 : 8,141.64 = 2,143.72 : x
  2. Step 2: Convert to fraction form
    5,430.25/8,141.64 = 2,143.72/x
  3. Step 3: Cross multiply
    5,430.25x = 8,141.64 × 2,143.72
  4. Step 4: Simplify right side
    5,430.25x = 17,453,396.50
  5. Step 5: Solve for x
    x = 17,453,396.50/5,430.25
  6. Step 6: Final answer
    x = 3,214.11

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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.