Home / 12,159.40-18,239.86-3,839.74

Finding the Fourth Proportional to 12,159.40, 18,239.86 and 3,839.74

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Solution

The fourth proportional to 12,159.40, 18,239.86 and 3,839.74 is: 5,759.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,159.40 : 18,239.86 = 3,839.74 : x
  2. Step 2: Convert to fraction form
    12,159.40/18,239.86 = 3,839.74/x
  3. Step 3: Cross multiply
    12,159.40x = 18,239.86 × 3,839.74
  4. Step 4: Simplify right side
    12,159.40x = 70,036,319.06
  5. Step 5: Solve for x
    x = 70,036,319.06/12,159.40
  6. Step 6: Final answer
    x = 5,759.85

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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.