Home / 20,660.08-28,510.74-11,228.70

Finding the Fourth Proportional to 20,660.08, 28,510.74 and 11,228.70

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Solution

The fourth proportional to 20,660.08, 28,510.74 and 11,228.70 is: 15,495.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.08 : 28,510.74 = 11,228.70 : x
  2. Step 2: Convert to fraction form
    20,660.08/28,510.74 = 11,228.70/x
  3. Step 3: Cross multiply
    20,660.08x = 28,510.74 × 11,228.70
  4. Step 4: Simplify right side
    20,660.08x = 320,138,546.24
  5. Step 5: Solve for x
    x = 320,138,546.24/20,660.08
  6. Step 6: Final answer
    x = 15,495.51

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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.