Home / 20,979.37-31,432.13-19,730.73

Finding the Fourth Proportional to 20,979.37, 31,432.13 and 19,730.73

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Solution

The fourth proportional to 20,979.37, 31,432.13 and 19,730.73 is: 29,561.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.37 : 31,432.13 = 19,730.73 : x
  2. Step 2: Convert to fraction form
    20,979.37/31,432.13 = 19,730.73/x
  3. Step 3: Cross multiply
    20,979.37x = 31,432.13 × 19,730.73
  4. Step 4: Simplify right side
    20,979.37x = 620,178,870.35
  5. Step 5: Solve for x
    x = 620,178,870.35/20,979.37
  6. Step 6: Final answer
    x = 29,561.37

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1.5x scale

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.