Home / 19,098.80-28,648.20-12,455.90

Finding the Fourth Proportional to 19,098.80, 28,648.20 and 12,455.90

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Solution

The fourth proportional to 19,098.80, 28,648.20 and 12,455.90 is: 18,683.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,098.80 : 28,648.20 = 12,455.90 : x
  2. Step 2: Convert to fraction form
    19,098.80/28,648.20 = 12,455.90/x
  3. Step 3: Cross multiply
    19,098.80x = 28,648.20 × 12,455.90
  4. Step 4: Simplify right side
    19,098.80x = 356,839,114.38
  5. Step 5: Solve for x
    x = 356,839,114.38/19,098.80
  6. Step 6: Final answer
    x = 18,683.85

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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.