Home / 19,212.40-28,780.20-10,994.80

Finding the Fourth Proportional to 19,212.40, 28,780.20 and 10,994.80

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Solution

The fourth proportional to 19,212.40, 28,780.20 and 10,994.80 is: 16,470.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,212.40 : 28,780.20 = 10,994.80 : x
  2. Step 2: Convert to fraction form
    19,212.40/28,780.20 = 10,994.80/x
  3. Step 3: Cross multiply
    19,212.40x = 28,780.20 × 10,994.80
  4. Step 4: Simplify right side
    19,212.40x = 316,432,542.96
  5. Step 5: Solve for x
    x = 316,432,542.96/19,212.40
  6. Step 6: Final answer
    x = 16,470.22

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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.