Home / 30,808.31-42,519.86-17,380.80

Finding the Fourth Proportional to 30,808.31, 42,519.86 and 17,380.80

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Solution

The fourth proportional to 30,808.31, 42,519.86 and 17,380.80 is: 23,987.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,808.31 : 42,519.86 = 17,380.80 : x
  2. Step 2: Convert to fraction form
    30,808.31/42,519.86 = 17,380.80/x
  3. Step 3: Cross multiply
    30,808.31x = 42,519.86 × 17,380.80
  4. Step 4: Simplify right side
    30,808.31x = 739,029,095.78
  5. Step 5: Solve for x
    x = 739,029,095.78/30,808.31
  6. Step 6: Final answer
    x = 23,987.98

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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.