Home / 30,781.89-42,479.00-17,353.15

Finding the Fourth Proportional to 30,781.89, 42,479.00 and 17,353.15

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Solution

The fourth proportional to 30,781.89, 42,479.00 and 17,353.15 is: 23,947.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,781.89 : 42,479.00 = 17,353.15 : x
  2. Step 2: Convert to fraction form
    30,781.89/42,479.00 = 17,353.15/x
  3. Step 3: Cross multiply
    30,781.89x = 42,479.00 × 17,353.15
  4. Step 4: Simplify right side
    30,781.89x = 737,144,289.84
  5. Step 5: Solve for x
    x = 737,144,289.84/30,781.89
  6. Step 6: Final answer
    x = 23,947.34

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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.