Home / 19,190.76-28,780.78-12,160.36

Finding the Fourth Proportional to 19,190.76, 28,780.78 and 12,160.36

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Solution

The fourth proportional to 19,190.76, 28,780.78 and 12,160.36 is: 18,237.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,190.76 : 28,780.78 = 12,160.36 : x
  2. Step 2: Convert to fraction form
    19,190.76/28,780.78 = 12,160.36/x
  3. Step 3: Cross multiply
    19,190.76x = 28,780.78 × 12,160.36
  4. Step 4: Simplify right side
    19,190.76x = 349,984,645.88
  5. Step 5: Solve for x
    x = 349,984,645.88/19,190.76
  6. Step 6: Final answer
    x = 18,237.14

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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.