Home / 20,828,979.96-31,248,458.28-8,691,691.70

Finding the Fourth Proportional to 20,828,979.96, 31,248,458.28 and 8,691,691.70

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Solution

The fourth proportional to 20,828,979.96, 31,248,458.28 and 8,691,691.70 is: 13,039,619.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828,979.96 : 31,248,458.28 = 8,691,691.70 : x
  2. Step 2: Convert to fraction form
    20,828,979.96/31,248,458.28 = 8,691,691.70/x
  3. Step 3: Cross multiply
    20,828,979.96x = 31,248,458.28 × 8,691,691.70
  4. Step 4: Simplify right side
    20,828,979.96x = 271,601,965,470,072.25
  5. Step 5: Solve for x
    x = 271,601,965,470,072.25/20,828,979.96
  6. Step 6: Final answer
    x = 13,039,619.13

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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.