Home / 12,255.42-18,382.98-3,490.40

Finding the Fourth Proportional to 12,255.42, 18,382.98 and 3,490.40

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Solution

The fourth proportional to 12,255.42, 18,382.98 and 3,490.40 is: 5,235.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,255.42 : 18,382.98 = 3,490.40 : x
  2. Step 2: Convert to fraction form
    12,255.42/18,382.98 = 3,490.40/x
  3. Step 3: Cross multiply
    12,255.42x = 18,382.98 × 3,490.40
  4. Step 4: Simplify right side
    12,255.42x = 64,163,953.39
  5. Step 5: Solve for x
    x = 64,163,953.39/12,255.42
  6. Step 6: Final answer
    x = 5,235.56

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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.