Home / 12,195.20-18,291.84-3,430.40

Finding the Fourth Proportional to 12,195.20, 18,291.84 and 3,430.40

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Solution

The fourth proportional to 12,195.20, 18,291.84 and 3,430.40 is: 5,145.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,195.20 : 18,291.84 = 3,430.40 : x
  2. Step 2: Convert to fraction form
    12,195.20/18,291.84 = 3,430.40/x
  3. Step 3: Cross multiply
    12,195.20x = 18,291.84 × 3,430.40
  4. Step 4: Simplify right side
    12,195.20x = 62,748,327.94
  5. Step 5: Solve for x
    x = 62,748,327.94/12,195.20
  6. Step 6: Final answer
    x = 5,145.33

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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.