Home / 31,208.32-43,083.12-21,189.76

Finding the Fourth Proportional to 31,208.32, 43,083.12 and 21,189.76

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Solution

The fourth proportional to 31,208.32, 43,083.12 and 21,189.76 is: 29,252.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,208.32 : 43,083.12 = 21,189.76 : x
  2. Step 2: Convert to fraction form
    31,208.32/43,083.12 = 21,189.76/x
  3. Step 3: Cross multiply
    31,208.32x = 43,083.12 × 21,189.76
  4. Step 4: Simplify right side
    31,208.32x = 912,920,972.85
  5. Step 5: Solve for x
    x = 912,920,972.85/31,208.32
  6. Step 6: Final answer
    x = 29,252.49

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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.