Home / 28,178.35-42,256.59-12,382.75

Finding the Fourth Proportional to 28,178.35, 42,256.59 and 12,382.75

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Solution

The fourth proportional to 28,178.35, 42,256.59 and 12,382.75 is: 18,569.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,178.35 : 42,256.59 = 12,382.75 : x
  2. Step 2: Convert to fraction form
    28,178.35/42,256.59 = 12,382.75/x
  3. Step 3: Cross multiply
    28,178.35x = 42,256.59 × 12,382.75
  4. Step 4: Simplify right side
    28,178.35x = 523,252,789.82
  5. Step 5: Solve for x
    x = 523,252,789.82/28,178.35
  6. Step 6: Final answer
    x = 18,569.32

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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.