Home / 8,491.49-11,722.89-5,135.19

Finding the Fourth Proportional to 8,491.49, 11,722.89 and 5,135.19

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Solution

The fourth proportional to 8,491.49, 11,722.89 and 5,135.19 is: 7,089.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,491.49 : 11,722.89 = 5,135.19 : x
  2. Step 2: Convert to fraction form
    8,491.49/11,722.89 = 5,135.19/x
  3. Step 3: Cross multiply
    8,491.49x = 11,722.89 × 5,135.19
  4. Step 4: Simplify right side
    8,491.49x = 60,199,267.50
  5. Step 5: Solve for x
    x = 60,199,267.50/8,491.49
  6. Step 6: Final answer
    x = 7,089.36

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Half scale
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Double scale
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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.