Home / 21,172,989.60-31,688,625.60-18,622,072.80

Finding the Fourth Proportional to 21,172,989.60, 31,688,625.60 and 18,622,072.80

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Solution

The fourth proportional to 21,172,989.60, 31,688,625.60 and 18,622,072.80 is: 27,870,787.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172,989.60 : 31,688,625.60 = 18,622,072.80 : x
  2. Step 2: Convert to fraction form
    21,172,989.60/31,688,625.60 = 18,622,072.80/x
  3. Step 3: Cross multiply
    21,172,989.60x = 31,688,625.60 × 18,622,072.80
  4. Step 4: Simplify right side
    21,172,989.60x = 590,107,892,855,143.75
  5. Step 5: Solve for x
    x = 590,107,892,855,143.75/21,172,989.60
  6. Step 6: Final answer
    x = 27,870,787.45

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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.