Home / 12,378.20-18,567.30-4,170.20

Finding the Fourth Proportional to 12,378.20, 18,567.30 and 4,170.20

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Solution

The fourth proportional to 12,378.20, 18,567.30 and 4,170.20 is: 6,255.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.20 : 18,567.30 = 4,170.20 : x
  2. Step 2: Convert to fraction form
    12,378.20/18,567.30 = 4,170.20/x
  3. Step 3: Cross multiply
    12,378.20x = 18,567.30 × 4,170.20
  4. Step 4: Simplify right side
    12,378.20x = 77,429,261.62
  5. Step 5: Solve for x
    x = 77,429,261.62/12,378.20
  6. Step 6: Final answer
    x = 6,255.30

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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.