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Finding the Fourth Proportional to 30,659.54, 42,313.94 and 17,230.50

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Solution

The fourth proportional to 30,659.54, 42,313.94 and 17,230.50 is: 23,780.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,659.54 : 42,313.94 = 17,230.50 : x
  2. Step 2: Convert to fraction form
    30,659.54/42,313.94 = 17,230.50/x
  3. Step 3: Cross multiply
    30,659.54x = 42,313.94 × 17,230.50
  4. Step 4: Simplify right side
    30,659.54x = 729,090,321.63
  5. Step 5: Solve for x
    x = 729,090,321.63/30,659.54
  6. Step 6: Final answer
    x = 23,780.21

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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.