Home / 21,679.86-32,485.77-12,909.99

Finding the Fourth Proportional to 21,679.86, 32,485.77 and 12,909.99

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Solution

The fourth proportional to 21,679.86, 32,485.77 and 12,909.99 is: 19,344.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,679.86 : 32,485.77 = 12,909.99 : x
  2. Step 2: Convert to fraction form
    21,679.86/32,485.77 = 12,909.99/x
  3. Step 3: Cross multiply
    21,679.86x = 32,485.77 × 12,909.99
  4. Step 4: Simplify right side
    21,679.86x = 419,390,965.84
  5. Step 5: Solve for x
    x = 419,390,965.84/21,679.86
  6. Step 6: Final answer
    x = 19,344.73

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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.