Home / 12,129.87-18,194.80-3,364.78

Finding the Fourth Proportional to 12,129.87, 18,194.80 and 3,364.78

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Solution

The fourth proportional to 12,129.87, 18,194.80 and 3,364.78 is: 5,047.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.87 : 18,194.80 = 3,364.78 : x
  2. Step 2: Convert to fraction form
    12,129.87/18,194.80 = 3,364.78/x
  3. Step 3: Cross multiply
    12,129.87x = 18,194.80 × 3,364.78
  4. Step 4: Simplify right side
    12,129.87x = 61,221,482.32
  5. Step 5: Solve for x
    x = 61,221,482.32/12,129.87
  6. Step 6: Final answer
    x = 5,047.17

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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.