Home / 31,126.20-42,954.75-16,979.01

Finding the Fourth Proportional to 31,126.20, 42,954.75 and 16,979.01

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Solution

The fourth proportional to 31,126.20, 42,954.75 and 16,979.01 is: 23,431.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,126.20 : 42,954.75 = 16,979.01 : x
  2. Step 2: Convert to fraction form
    31,126.20/42,954.75 = 16,979.01/x
  3. Step 3: Cross multiply
    31,126.20x = 42,954.75 × 16,979.01
  4. Step 4: Simplify right side
    31,126.20x = 729,329,129.80
  5. Step 5: Solve for x
    x = 729,329,129.80/31,126.20
  6. Step 6: Final answer
    x = 23,431.36

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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.