Home / 20,956.28-28,911.47-11,998.98

Finding the Fourth Proportional to 20,956.28, 28,911.47 and 11,998.98

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Solution

The fourth proportional to 20,956.28, 28,911.47 and 11,998.98 is: 16,553.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.28 : 28,911.47 = 11,998.98 : x
  2. Step 2: Convert to fraction form
    20,956.28/28,911.47 = 11,998.98/x
  3. Step 3: Cross multiply
    20,956.28x = 28,911.47 × 11,998.98
  4. Step 4: Simplify right side
    20,956.28x = 346,908,090.31
  5. Step 5: Solve for x
    x = 346,908,090.31/20,956.28
  6. Step 6: Final answer
    x = 16,553.90

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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.