Home / 20,711,785.40-31,067,678.10-7,249,974.20

Finding the Fourth Proportional to 20,711,785.40, 31,067,678.10 and 7,249,974.20

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Solution

The fourth proportional to 20,711,785.40, 31,067,678.10 and 7,249,974.20 is: 10,874,961.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711,785.40 : 31,067,678.10 = 7,249,974.20 : x
  2. Step 2: Convert to fraction form
    20,711,785.40/31,067,678.10 = 7,249,974.20/x
  3. Step 3: Cross multiply
    20,711,785.40x = 31,067,678.10 × 7,249,974.20
  4. Step 4: Simplify right side
    20,711,785.40x = 225,239,864,678,905.03
  5. Step 5: Solve for x
    x = 225,239,864,678,905.03/20,711,785.40
  6. Step 6: Final answer
    x = 10,874,961.30

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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.