Home / 19,006.20-28,509.30-12,007.80

Finding the Fourth Proportional to 19,006.20, 28,509.30 and 12,007.80

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Solution

The fourth proportional to 19,006.20, 28,509.30 and 12,007.80 is: 18,011.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,006.20 : 28,509.30 = 12,007.80 : x
  2. Step 2: Convert to fraction form
    19,006.20/28,509.30 = 12,007.80/x
  3. Step 3: Cross multiply
    19,006.20x = 28,509.30 × 12,007.80
  4. Step 4: Simplify right side
    19,006.20x = 342,333,972.54
  5. Step 5: Solve for x
    x = 342,333,972.54/19,006.20
  6. Step 6: Final answer
    x = 18,011.70

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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.