Home / 20,261.25-30,370.80-8,421.47

Finding the Fourth Proportional to 20,261.25, 30,370.80 and 8,421.47

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Solution

The fourth proportional to 20,261.25, 30,370.80 and 8,421.47 is: 12,623.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,261.25 : 30,370.80 = 8,421.47 : x
  2. Step 2: Convert to fraction form
    20,261.25/30,370.80 = 8,421.47/x
  3. Step 3: Cross multiply
    20,261.25x = 30,370.80 × 8,421.47
  4. Step 4: Simplify right side
    20,261.25x = 255,766,780.61
  5. Step 5: Solve for x
    x = 255,766,780.61/20,261.25
  6. Step 6: Final answer
    x = 12,623.44

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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.