Home / 31,139.08-42,972.97-16,992.70

Finding the Fourth Proportional to 31,139.08, 42,972.97 and 16,992.70

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Solution

The fourth proportional to 31,139.08, 42,972.97 and 16,992.70 is: 23,450.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,139.08 : 42,972.97 = 16,992.70 : x
  2. Step 2: Convert to fraction form
    31,139.08/42,972.97 = 16,992.70/x
  3. Step 3: Cross multiply
    31,139.08x = 42,972.97 × 16,992.70
  4. Step 4: Simplify right side
    31,139.08x = 730,226,637.40
  5. Step 5: Solve for x
    x = 730,226,637.40/31,139.08
  6. Step 6: Final answer
    x = 23,450.49

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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.