Home / 20,763,721.05-31,145,581.58-9,978,421.20

Finding the Fourth Proportional to 20,763,721.05, 31,145,581.58 and 9,978,421.20

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Solution

The fourth proportional to 20,763,721.05, 31,145,581.58 and 9,978,421.20 is: 14,967,631.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,763,721.05 : 31,145,581.58 = 9,978,421.20 : x
  2. Step 2: Convert to fraction form
    20,763,721.05/31,145,581.58 = 9,978,421.20/x
  3. Step 3: Cross multiply
    20,763,721.05x = 31,145,581.58 × 9,978,421.20
  4. Step 4: Simplify right side
    20,763,721.05x = 310,783,731,474,309.38
  5. Step 5: Solve for x
    x = 310,783,731,474,309.38/20,763,721.05
  6. Step 6: Final answer
    x = 14,967,631.80

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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.