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Finding the Fourth Proportional to 15,619.57, 21,555.54 and 8,545.99

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Solution

The fourth proportional to 15,619.57, 21,555.54 and 8,545.99 is: 11,793.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,619.57 : 21,555.54 = 8,545.99 : x
  2. Step 2: Convert to fraction form
    15,619.57/21,555.54 = 8,545.99/x
  3. Step 3: Cross multiply
    15,619.57x = 21,555.54 × 8,545.99
  4. Step 4: Simplify right side
    15,619.57x = 184,213,375.40
  5. Step 5: Solve for x
    x = 184,213,375.40/15,619.57
  6. Step 6: Final answer
    x = 11,793.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.