Home / 12,780.20-19,172.10-4,015.80

Finding the Fourth Proportional to 12,780.20, 19,172.10 and 4,015.80

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Solution

The fourth proportional to 12,780.20, 19,172.10 and 4,015.80 is: 6,024.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.20 : 19,172.10 = 4,015.80 : x
  2. Step 2: Convert to fraction form
    12,780.20/19,172.10 = 4,015.80/x
  3. Step 3: Cross multiply
    12,780.20x = 19,172.10 × 4,015.80
  4. Step 4: Simplify right side
    12,780.20x = 76,991,319.18
  5. Step 5: Solve for x
    x = 76,991,319.18/12,780.20
  6. Step 6: Final answer
    x = 6,024.27

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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.