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Finding the Fourth Proportional to 30,859.79, 42,584.90 and 17,245.40

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Solution

The fourth proportional to 30,859.79, 42,584.90 and 17,245.40 is: 23,797.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,859.79 : 42,584.90 = 17,245.40 : x
  2. Step 2: Convert to fraction form
    30,859.79/42,584.90 = 17,245.40/x
  3. Step 3: Cross multiply
    30,859.79x = 42,584.90 × 17,245.40
  4. Step 4: Simplify right side
    30,859.79x = 734,393,335.31
  5. Step 5: Solve for x
    x = 734,393,335.31/30,859.79
  6. Step 6: Final answer
    x = 23,797.75

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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.