Home / 14,081.80-21,122.70-12,785.80

Finding the Fourth Proportional to 14,081.80, 21,122.70 and 12,785.80

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Solution

The fourth proportional to 14,081.80, 21,122.70 and 12,785.80 is: 19,178.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,081.80 : 21,122.70 = 12,785.80 : x
  2. Step 2: Convert to fraction form
    14,081.80/21,122.70 = 12,785.80/x
  3. Step 3: Cross multiply
    14,081.80x = 21,122.70 × 12,785.80
  4. Step 4: Simplify right side
    14,081.80x = 270,070,617.66
  5. Step 5: Solve for x
    x = 270,070,617.66/14,081.80
  6. Step 6: Final answer
    x = 19,178.70

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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.