Home / 13,981.88-20,966.20-5,090.92

Finding the Fourth Proportional to 13,981.88, 20,966.20 and 5,090.92

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Solution

The fourth proportional to 13,981.88, 20,966.20 and 5,090.92 is: 7,633.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.88 : 20,966.20 = 5,090.92 : x
  2. Step 2: Convert to fraction form
    13,981.88/20,966.20 = 5,090.92/x
  3. Step 3: Cross multiply
    13,981.88x = 20,966.20 × 5,090.92
  4. Step 4: Simplify right side
    13,981.88x = 106,737,181.76
  5. Step 5: Solve for x
    x = 106,737,181.76/13,981.88
  6. Step 6: Final answer
    x = 7,633.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.