Home / 19,936.90-29,905.40-18,719.02

Finding the Fourth Proportional to 19,936.90, 29,905.40 and 18,719.02

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Solution

The fourth proportional to 19,936.90, 29,905.40 and 18,719.02 is: 28,078.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,936.90 : 29,905.40 = 18,719.02 : x
  2. Step 2: Convert to fraction form
    19,936.90/29,905.40 = 18,719.02/x
  3. Step 3: Cross multiply
    19,936.90x = 29,905.40 × 18,719.02
  4. Step 4: Simplify right side
    19,936.90x = 559,799,780.71
  5. Step 5: Solve for x
    x = 559,799,780.71/19,936.90
  6. Step 6: Final answer
    x = 28,078.58

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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.