Home / 20,277.10-27,990.93-12,321.88

Finding the Fourth Proportional to 20,277.10, 27,990.93 and 12,321.88

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Solution

The fourth proportional to 20,277.10, 27,990.93 and 12,321.88 is: 17,009.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,277.10 : 27,990.93 = 12,321.88 : x
  2. Step 2: Convert to fraction form
    20,277.10/27,990.93 = 12,321.88/x
  3. Step 3: Cross multiply
    20,277.10x = 27,990.93 × 12,321.88
  4. Step 4: Simplify right side
    20,277.10x = 344,900,880.55
  5. Step 5: Solve for x
    x = 344,900,880.55/20,277.10
  6. Step 6: Final answer
    x = 17,009.38

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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.