Home / 12,785.20-19,155.90-10,160.80

Finding the Fourth Proportional to 12,785.20, 19,155.90 and 10,160.80

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Solution

The fourth proportional to 12,785.20, 19,155.90 and 10,160.80 is: 15,223.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,785.20 : 19,155.90 = 10,160.80 : x
  2. Step 2: Convert to fraction form
    12,785.20/19,155.90 = 10,160.80/x
  3. Step 3: Cross multiply
    12,785.20x = 19,155.90 × 10,160.80
  4. Step 4: Simplify right side
    12,785.20x = 194,639,268.72
  5. Step 5: Solve for x
    x = 194,639,268.72/12,785.20
  6. Step 6: Final answer
    x = 15,223.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.