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Finding the Fourth Proportional to 30,569.72, 42,193.71 and 18,639.63

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Solution

The fourth proportional to 30,569.72, 42,193.71 and 18,639.63 is: 25,727.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,569.72 : 42,193.71 = 18,639.63 : x
  2. Step 2: Convert to fraction form
    30,569.72/42,193.71 = 18,639.63/x
  3. Step 3: Cross multiply
    30,569.72x = 42,193.71 × 18,639.63
  4. Step 4: Simplify right side
    30,569.72x = 786,475,142.73
  5. Step 5: Solve for x
    x = 786,475,142.73/30,569.72
  6. Step 6: Final answer
    x = 25,727.26

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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.