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Finding the Fourth Proportional to 30,569.92, 42,180.96 and 20,512.96

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Solution

The fourth proportional to 30,569.92, 42,180.96 and 20,512.96 is: 28,304.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,569.92 : 42,180.96 = 20,512.96 : x
  2. Step 2: Convert to fraction form
    30,569.92/42,180.96 = 20,512.96/x
  3. Step 3: Cross multiply
    30,569.92x = 42,180.96 × 20,512.96
  4. Step 4: Simplify right side
    30,569.92x = 865,256,345.24
  5. Step 5: Solve for x
    x = 865,256,345.24/30,569.92
  6. Step 6: Final answer
    x = 28,304.17

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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.