Home / 13,785.39-20,641.64-8,158.73

Finding the Fourth Proportional to 13,785.39, 20,641.64 and 8,158.73

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Solution

The fourth proportional to 13,785.39, 20,641.64 and 8,158.73 is: 12,216.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,785.39 : 20,641.64 = 8,158.73 : x
  2. Step 2: Convert to fraction form
    13,785.39/20,641.64 = 8,158.73/x
  3. Step 3: Cross multiply
    13,785.39x = 20,641.64 × 8,158.73
  4. Step 4: Simplify right side
    13,785.39x = 168,409,423.52
  5. Step 5: Solve for x
    x = 168,409,423.52/13,785.39
  6. Step 6: Final answer
    x = 12,216.51

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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.