Home / 20,660.56-28,510.78-11,228.80

Finding the Fourth Proportional to 20,660.56, 28,510.78 and 11,228.80

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Solution

The fourth proportional to 20,660.56, 28,510.78 and 11,228.80 is: 15,495.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.56 : 28,510.78 = 11,228.80 : x
  2. Step 2: Convert to fraction form
    20,660.56/28,510.78 = 11,228.80/x
  3. Step 3: Cross multiply
    20,660.56x = 28,510.78 × 11,228.80
  4. Step 4: Simplify right side
    20,660.56x = 320,141,846.46
  5. Step 5: Solve for x
    x = 320,141,846.46/20,660.56
  6. Step 6: Final answer
    x = 15,495.31

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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.