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Finding the Fourth Proportional to 19,099.61, 28,649.61 and 5,772.71

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Solution

The fourth proportional to 19,099.61, 28,649.61 and 5,772.71 is: 8,659.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,099.61 : 28,649.61 = 5,772.71 : x
  2. Step 2: Convert to fraction form
    19,099.61/28,649.61 = 5,772.71/x
  3. Step 3: Cross multiply
    19,099.61x = 28,649.61 × 5,772.71
  4. Step 4: Simplify right side
    19,099.61x = 165,385,940.61
  5. Step 5: Solve for x
    x = 165,385,940.61/19,099.61
  6. Step 6: Final answer
    x = 8,659.13

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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.