Home / 20,905,420.43-31,368,393.16-9,399,006.54

Finding the Fourth Proportional to 20,905,420.43, 31,368,393.16 and 9,399,006.54

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Solution

The fourth proportional to 20,905,420.43, 31,368,393.16 and 9,399,006.54 is: 14,103,123.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905,420.43 : 31,368,393.16 = 9,399,006.54 : x
  2. Step 2: Convert to fraction form
    20,905,420.43/31,368,393.16 = 9,399,006.54/x
  3. Step 3: Cross multiply
    20,905,420.43x = 31,368,393.16 × 9,399,006.54
  4. Step 4: Simplify right side
    20,905,420.43x = 294,831,732,436,633.69
  5. Step 5: Solve for x
    x = 294,831,732,436,633.69/20,905,420.43
  6. Step 6: Final answer
    x = 14,103,123.80

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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.