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Finding the Fourth Proportional to 30,572.54, 42,168.04 and 18,636.38

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Solution

The fourth proportional to 30,572.54, 42,168.04 and 18,636.38 is: 25,704.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,572.54 : 42,168.04 = 18,636.38 : x
  2. Step 2: Convert to fraction form
    30,572.54/42,168.04 = 18,636.38/x
  3. Step 3: Cross multiply
    30,572.54x = 42,168.04 × 18,636.38
  4. Step 4: Simplify right side
    30,572.54x = 785,859,622.82
  5. Step 5: Solve for x
    x = 785,859,622.82/30,572.54
  6. Step 6: Final answer
    x = 25,704.76

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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.