Home / 15,149.43-20,905.75-8,434.91

Finding the Fourth Proportional to 15,149.43, 20,905.75 and 8,434.91

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Solution

The fourth proportional to 15,149.43, 20,905.75 and 8,434.91 is: 11,639.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,149.43 : 20,905.75 = 8,434.91 : x
  2. Step 2: Convert to fraction form
    15,149.43/20,905.75 = 8,434.91/x
  3. Step 3: Cross multiply
    15,149.43x = 20,905.75 × 8,434.91
  4. Step 4: Simplify right side
    15,149.43x = 176,338,076.30
  5. Step 5: Solve for x
    x = 176,338,076.30/15,149.43
  6. Step 6: Final answer
    x = 11,639.91

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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.