Home / 20,561.26-30,841.79-4,978.88

Finding the Fourth Proportional to 20,561.26, 30,841.79 and 4,978.88

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Solution

The fourth proportional to 20,561.26, 30,841.79 and 4,978.88 is: 7,468.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.26 : 30,841.79 = 4,978.88 : x
  2. Step 2: Convert to fraction form
    20,561.26/30,841.79 = 4,978.88/x
  3. Step 3: Cross multiply
    20,561.26x = 30,841.79 × 4,978.88
  4. Step 4: Simplify right side
    20,561.26x = 153,557,623.61
  5. Step 5: Solve for x
    x = 153,557,623.61/20,561.26
  6. Step 6: Final answer
    x = 7,468.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.