Home / 20,997.84-28,977.18-11,437.92

Finding the Fourth Proportional to 20,997.84, 28,977.18 and 11,437.92

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Solution

The fourth proportional to 20,997.84, 28,977.18 and 11,437.92 is: 15,784.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.84 : 28,977.18 = 11,437.92 : x
  2. Step 2: Convert to fraction form
    20,997.84/28,977.18 = 11,437.92/x
  3. Step 3: Cross multiply
    20,997.84x = 28,977.18 × 11,437.92
  4. Step 4: Simplify right side
    20,997.84x = 331,438,666.67
  5. Step 5: Solve for x
    x = 331,438,666.67/20,997.84
  6. Step 6: Final answer
    x = 15,784.42

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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.