Home / 13,723.78-18,939.18-7,755.58

Finding the Fourth Proportional to 13,723.78, 18,939.18 and 7,755.58

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Solution

The fourth proportional to 13,723.78, 18,939.18 and 7,755.58 is: 10,702.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,723.78 : 18,939.18 = 7,755.58 : x
  2. Step 2: Convert to fraction form
    13,723.78/18,939.18 = 7,755.58/x
  3. Step 3: Cross multiply
    13,723.78x = 18,939.18 × 7,755.58
  4. Step 4: Simplify right side
    13,723.78x = 146,884,325.62
  5. Step 5: Solve for x
    x = 146,884,325.62/13,723.78
  6. Step 6: Final answer
    x = 10,702.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.