Home / 28,106.18-38,785.86-15,358.80

Finding the Fourth Proportional to 28,106.18, 38,785.86 and 15,358.80

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Solution

The fourth proportional to 28,106.18, 38,785.86 and 15,358.80 is: 21,194.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,106.18 : 38,785.86 = 15,358.80 : x
  2. Step 2: Convert to fraction form
    28,106.18/38,785.86 = 15,358.80/x
  3. Step 3: Cross multiply
    28,106.18x = 38,785.86 × 15,358.80
  4. Step 4: Simplify right side
    28,106.18x = 595,704,266.57
  5. Step 5: Solve for x
    x = 595,704,266.57/28,106.18
  6. Step 6: Final answer
    x = 21,194.78

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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.