Home / 31,640.84-43,678.68-20,326.76

Finding the Fourth Proportional to 31,640.84, 43,678.68 and 20,326.76

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Solution

The fourth proportional to 31,640.84, 43,678.68 and 20,326.76 is: 28,060.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,640.84 : 43,678.68 = 20,326.76 : x
  2. Step 2: Convert to fraction form
    31,640.84/43,678.68 = 20,326.76/x
  3. Step 3: Cross multiply
    31,640.84x = 43,678.68 × 20,326.76
  4. Step 4: Simplify right side
    31,640.84x = 887,846,045.48
  5. Step 5: Solve for x
    x = 887,846,045.48/31,640.84
  6. Step 6: Final answer
    x = 28,060.13

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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.