Home / 18,991.04-28,469.20-8,455.52

Finding the Fourth Proportional to 18,991.04, 28,469.20 and 8,455.52

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Solution

The fourth proportional to 18,991.04, 28,469.20 and 8,455.52 is: 12,675.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.04 : 28,469.20 = 8,455.52 : x
  2. Step 2: Convert to fraction form
    18,991.04/28,469.20 = 8,455.52/x
  3. Step 3: Cross multiply
    18,991.04x = 28,469.20 × 8,455.52
  4. Step 4: Simplify right side
    18,991.04x = 240,721,889.98
  5. Step 5: Solve for x
    x = 240,721,889.98/18,991.04
  6. Step 6: Final answer
    x = 12,675.55

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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.