Home / 20,989.68-28,971.45-12,041.88

Finding the Fourth Proportional to 20,989.68, 28,971.45 and 12,041.88

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Solution

The fourth proportional to 20,989.68, 28,971.45 and 12,041.88 is: 16,621.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.68 : 28,971.45 = 12,041.88 : x
  2. Step 2: Convert to fraction form
    20,989.68/28,971.45 = 12,041.88/x
  3. Step 3: Cross multiply
    20,989.68x = 28,971.45 × 12,041.88
  4. Step 4: Simplify right side
    20,989.68x = 348,870,724.33
  5. Step 5: Solve for x
    x = 348,870,724.33/20,989.68
  6. Step 6: Final answer
    x = 16,621.06

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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.