Home / 15,147.73-20,905.23-8,434.86

Finding the Fourth Proportional to 15,147.73, 20,905.23 and 8,434.86

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Solution

The fourth proportional to 15,147.73, 20,905.23 and 8,434.86 is: 11,640.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,147.73 : 20,905.23 = 8,434.86 : x
  2. Step 2: Convert to fraction form
    15,147.73/20,905.23 = 8,434.86/x
  3. Step 3: Cross multiply
    15,147.73x = 20,905.23 × 8,434.86
  4. Step 4: Simplify right side
    15,147.73x = 176,332,688.32
  5. Step 5: Solve for x
    x = 176,332,688.32/15,147.73
  6. Step 6: Final answer
    x = 11,640.87

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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.