Home / 11,148.57-15,357.13-8,491.36

Finding the Fourth Proportional to 11,148.57, 15,357.13 and 8,491.36

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Solution

The fourth proportional to 11,148.57, 15,357.13 and 8,491.36 is: 11,696.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,148.57 : 15,357.13 = 8,491.36 : x
  2. Step 2: Convert to fraction form
    11,148.57/15,357.13 = 8,491.36/x
  3. Step 3: Cross multiply
    11,148.57x = 15,357.13 × 8,491.36
  4. Step 4: Simplify right side
    11,148.57x = 130,402,919.40
  5. Step 5: Solve for x
    x = 130,402,919.40/11,148.57
  6. Step 6: Final answer
    x = 11,696.83

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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.