Home / 19,979.28-29,977.02-10,121.31

Finding the Fourth Proportional to 19,979.28, 29,977.02 and 10,121.31

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Solution

The fourth proportional to 19,979.28, 29,977.02 and 10,121.31 is: 15,186.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,979.28 : 29,977.02 = 10,121.31 : x
  2. Step 2: Convert to fraction form
    19,979.28/29,977.02 = 10,121.31/x
  3. Step 3: Cross multiply
    19,979.28x = 29,977.02 × 10,121.31
  4. Step 4: Simplify right side
    19,979.28x = 303,406,712.30
  5. Step 5: Solve for x
    x = 303,406,712.30/19,979.28
  6. Step 6: Final answer
    x = 15,186.07

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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.