Home / 20,989.91-28,968.84-12,035.66

Finding the Fourth Proportional to 20,989.91, 28,968.84 and 12,035.66

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Solution

The fourth proportional to 20,989.91, 28,968.84 and 12,035.66 is: 16,610.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.91 : 28,968.84 = 12,035.66 : x
  2. Step 2: Convert to fraction form
    20,989.91/28,968.84 = 12,035.66/x
  3. Step 3: Cross multiply
    20,989.91x = 28,968.84 × 12,035.66
  4. Step 4: Simplify right side
    20,989.91x = 348,659,108.83
  5. Step 5: Solve for x
    x = 348,659,108.83/20,989.91
  6. Step 6: Final answer
    x = 16,610.80

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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.