Home / 19,845.56-29,769-9,979.44

Finding the Fourth Proportional to 19,845.56, 29,769 and 9,979.44

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Solution

The fourth proportional to 19,845.56, 29,769 and 9,979.44 is: 14,969.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,845.56 : 29,769 = 9,979.44 : x
  2. Step 2: Convert to fraction form
    19,845.56/29,769 = 9,979.44/x
  3. Step 3: Cross multiply
    19,845.56x = 29,769 × 9,979.44
  4. Step 4: Simplify right side
    19,845.56x = 297,077,949.36
  5. Step 5: Solve for x
    x = 297,077,949.36/19,845.56
  6. Step 6: Final answer
    x = 14,969.49

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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.