Home / 5,430.58-8,140.32-2,139.14

Finding the Fourth Proportional to 5,430.58, 8,140.32 and 2,139.14

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Solution

The fourth proportional to 5,430.58, 8,140.32 and 2,139.14 is: 3,206.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,430.58 : 8,140.32 = 2,139.14 : x
  2. Step 2: Convert to fraction form
    5,430.58/8,140.32 = 2,139.14/x
  3. Step 3: Cross multiply
    5,430.58x = 8,140.32 × 2,139.14
  4. Step 4: Simplify right side
    5,430.58x = 17,413,304.48
  5. Step 5: Solve for x
    x = 17,413,304.48/5,430.58
  6. Step 6: Final answer
    x = 3,206.53

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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.