Home / 13,128.70-19,704.90-8,901.72

Finding the Fourth Proportional to 13,128.70, 19,704.90 and 8,901.72

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Solution

The fourth proportional to 13,128.70, 19,704.90 and 8,901.72 is: 13,360.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.70 : 19,704.90 = 8,901.72 : x
  2. Step 2: Convert to fraction form
    13,128.70/19,704.90 = 8,901.72/x
  3. Step 3: Cross multiply
    13,128.70x = 19,704.90 × 8,901.72
  4. Step 4: Simplify right side
    13,128.70x = 175,407,502.43
  5. Step 5: Solve for x
    x = 175,407,502.43/13,128.70
  6. Step 6: Final answer
    x = 13,360.61

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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.