Home / 20,877.93-28,789.56-15,785.41

Finding the Fourth Proportional to 20,877.93, 28,789.56 and 15,785.41

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Solution

The fourth proportional to 20,877.93, 28,789.56 and 15,785.41 is: 21,767.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.93 : 28,789.56 = 15,785.41 : x
  2. Step 2: Convert to fraction form
    20,877.93/28,789.56 = 15,785.41/x
  3. Step 3: Cross multiply
    20,877.93x = 28,789.56 × 15,785.41
  4. Step 4: Simplify right side
    20,877.93x = 454,454,864.37
  5. Step 5: Solve for x
    x = 454,454,864.37/20,877.93
  6. Step 6: Final answer
    x = 21,767.24

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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.