Home / 20,977.01-28,947.90-11,416.56

Finding the Fourth Proportional to 20,977.01, 28,947.90 and 11,416.56

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Solution

The fourth proportional to 20,977.01, 28,947.90 and 11,416.56 is: 15,754.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,977.01 : 28,947.90 = 11,416.56 : x
  2. Step 2: Convert to fraction form
    20,977.01/28,947.90 = 11,416.56/x
  3. Step 3: Cross multiply
    20,977.01x = 28,947.90 × 11,416.56
  4. Step 4: Simplify right side
    20,977.01x = 330,485,470.10
  5. Step 5: Solve for x
    x = 330,485,470.10/20,977.01
  6. Step 6: Final answer
    x = 15,754.65

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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.