Home / 15,515.19-21,411.41-8,442.09

Finding the Fourth Proportional to 15,515.19, 21,411.41 and 8,442.09

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Solution

The fourth proportional to 15,515.19, 21,411.41 and 8,442.09 is: 11,650.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.19 : 21,411.41 = 8,442.09 : x
  2. Step 2: Convert to fraction form
    15,515.19/21,411.41 = 8,442.09/x
  3. Step 3: Cross multiply
    15,515.19x = 21,411.41 × 8,442.09
  4. Step 4: Simplify right side
    15,515.19x = 180,757,008.04
  5. Step 5: Solve for x
    x = 180,757,008.04/15,515.19
  6. Step 6: Final answer
    x = 11,650.33

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Half scale
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Double scale
Find fourth proportional to 15,516.19, 21,412.79 and 8,443.09
Similar ratio
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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.