Home / 19,998.76-29,998.04-18,780.80

Finding the Fourth Proportional to 19,998.76, 29,998.04 and 18,780.80

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Solution

The fourth proportional to 19,998.76, 29,998.04 and 18,780.80 is: 28,171.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,998.76 : 29,998.04 = 18,780.80 : x
  2. Step 2: Convert to fraction form
    19,998.76/29,998.04 = 18,780.80/x
  3. Step 3: Cross multiply
    19,998.76x = 29,998.04 × 18,780.80
  4. Step 4: Simplify right side
    19,998.76x = 563,387,189.63
  5. Step 5: Solve for x
    x = 563,387,189.63/19,998.76
  6. Step 6: Final answer
    x = 28,171.11

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1.5x scale

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.