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Finding the Fourth Proportional to 20,407.48, 30,611.20 and 5,616.48

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Solution

The fourth proportional to 20,407.48, 30,611.20 and 5,616.48 is: 8,424.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407.48 : 30,611.20 = 5,616.48 : x
  2. Step 2: Convert to fraction form
    20,407.48/30,611.20 = 5,616.48/x
  3. Step 3: Cross multiply
    20,407.48x = 30,611.20 × 5,616.48
  4. Step 4: Simplify right side
    20,407.48x = 171,927,192.58
  5. Step 5: Solve for x
    x = 171,927,192.58/20,407.48
  6. Step 6: Final answer
    x = 8,424.71

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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.