Home / 20,790,397.47-31,183,213.98-5,439,168.78

Finding the Fourth Proportional to 20,790,397.47, 31,183,213.98 and 5,439,168.78

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Solution

The fourth proportional to 20,790,397.47, 31,183,213.98 and 5,439,168.78 is: 8,158,129.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790,397.47 : 31,183,213.98 = 5,439,168.78 : x
  2. Step 2: Convert to fraction form
    20,790,397.47/31,183,213.98 = 5,439,168.78/x
  3. Step 3: Cross multiply
    20,790,397.47x = 31,183,213.98 × 5,439,168.78
  4. Step 4: Simplify right side
    20,790,397.47x = 169,610,763,973,050.69
  5. Step 5: Solve for x
    x = 169,610,763,973,050.69/20,790,397.47
  6. Step 6: Final answer
    x = 8,158,129.93

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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.