Home / 20,977.01-28,941.75-11,900.87

Finding the Fourth Proportional to 20,977.01, 28,941.75 and 11,900.87

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Solution

The fourth proportional to 20,977.01, 28,941.75 and 11,900.87 is: 16,419.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,977.01 : 28,941.75 = 11,900.87 : x
  2. Step 2: Convert to fraction form
    20,977.01/28,941.75 = 11,900.87/x
  3. Step 3: Cross multiply
    20,977.01x = 28,941.75 × 11,900.87
  4. Step 4: Simplify right side
    20,977.01x = 344,431,859.61
  5. Step 5: Solve for x
    x = 344,431,859.61/20,977.01
  6. Step 6: Final answer
    x = 16,419.50

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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.