Home / 12,159.20-18,235.20-4,759.40

Finding the Fourth Proportional to 12,159.20, 18,235.20 and 4,759.40

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Solution

The fourth proportional to 12,159.20, 18,235.20 and 4,759.40 is: 7,137.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,159.20 : 18,235.20 = 4,759.40 : x
  2. Step 2: Convert to fraction form
    12,159.20/18,235.20 = 4,759.40/x
  3. Step 3: Cross multiply
    12,159.20x = 18,235.20 × 4,759.40
  4. Step 4: Simplify right side
    12,159.20x = 86,788,610.88
  5. Step 5: Solve for x
    x = 86,788,610.88/12,159.20
  6. Step 6: Final answer
    x = 7,137.69

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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.