Home / 13,136.12-18,128.05-7,470.72

Finding the Fourth Proportional to 13,136.12, 18,128.05 and 7,470.72

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Solution

The fourth proportional to 13,136.12, 18,128.05 and 7,470.72 is: 10,309.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.12 : 18,128.05 = 7,470.72 : x
  2. Step 2: Convert to fraction form
    13,136.12/18,128.05 = 7,470.72/x
  3. Step 3: Cross multiply
    13,136.12x = 18,128.05 × 7,470.72
  4. Step 4: Simplify right side
    13,136.12x = 135,429,585.70
  5. Step 5: Solve for x
    x = 135,429,585.70/13,136.12
  6. Step 6: Final answer
    x = 10,309.71

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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.