Home / 20,154.18-27,815.03-12,200.79

Finding the Fourth Proportional to 20,154.18, 27,815.03 and 12,200.79

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Solution

The fourth proportional to 20,154.18, 27,815.03 and 12,200.79 is: 16,838.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,154.18 : 27,815.03 = 12,200.79 : x
  2. Step 2: Convert to fraction form
    20,154.18/27,815.03 = 12,200.79/x
  3. Step 3: Cross multiply
    20,154.18x = 27,815.03 × 12,200.79
  4. Step 4: Simplify right side
    20,154.18x = 339,365,428.93
  5. Step 5: Solve for x
    x = 339,365,428.93/20,154.18
  6. Step 6: Final answer
    x = 16,838.46

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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.