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Finding the Fourth Proportional to 20,005.80, 30,008.70 and 15,048.60

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Solution

The fourth proportional to 20,005.80, 30,008.70 and 15,048.60 is: 22,572.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,005.80 : 30,008.70 = 15,048.60 : x
  2. Step 2: Convert to fraction form
    20,005.80/30,008.70 = 15,048.60/x
  3. Step 3: Cross multiply
    20,005.80x = 30,008.70 × 15,048.60
  4. Step 4: Simplify right side
    20,005.80x = 451,588,922.82
  5. Step 5: Solve for x
    x = 451,588,922.82/20,005.80
  6. Step 6: Final answer
    x = 22,572.90

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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.