Home / 20,989.23-28,966.35-12,036.66

Finding the Fourth Proportional to 20,989.23, 28,966.35 and 12,036.66

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Solution

The fourth proportional to 20,989.23, 28,966.35 and 12,036.66 is: 16,611.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.23 : 28,966.35 = 12,036.66 : x
  2. Step 2: Convert to fraction form
    20,989.23/28,966.35 = 12,036.66/x
  3. Step 3: Cross multiply
    20,989.23x = 28,966.35 × 12,036.66
  4. Step 4: Simplify right side
    20,989.23x = 348,658,106.39
  5. Step 5: Solve for x
    x = 348,658,106.39/20,989.23
  6. Step 6: Final answer
    x = 16,611.29

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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.