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Finding the Fourth Proportional to 30,790.92, 42,490.95 and 17,362.20

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Solution

The fourth proportional to 30,790.92, 42,490.95 and 17,362.20 is: 23,959.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,790.92 : 42,490.95 = 17,362.20 : x
  2. Step 2: Convert to fraction form
    30,790.92/42,490.95 = 17,362.20/x
  3. Step 3: Cross multiply
    30,790.92x = 42,490.95 × 17,362.20
  4. Step 4: Simplify right side
    30,790.92x = 737,736,372.09
  5. Step 5: Solve for x
    x = 737,736,372.09/30,790.92
  6. Step 6: Final answer
    x = 23,959.54

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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.