Home / 19,120.60-28,680.87-12,545.23

Finding the Fourth Proportional to 19,120.60, 28,680.87 and 12,545.23

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Solution

The fourth proportional to 19,120.60, 28,680.87 and 12,545.23 is: 18,817.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,120.60 : 28,680.87 = 12,545.23 : x
  2. Step 2: Convert to fraction form
    19,120.60/28,680.87 = 12,545.23/x
  3. Step 3: Cross multiply
    19,120.60x = 28,680.87 × 12,545.23
  4. Step 4: Simplify right side
    19,120.60x = 359,808,110.75
  5. Step 5: Solve for x
    x = 359,808,110.75/19,120.60
  6. Step 6: Final answer
    x = 18,817.83

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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.