Home / 15,464.21-21,340.77-8,390.69

Finding the Fourth Proportional to 15,464.21, 21,340.77 and 8,390.69

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Solution

The fourth proportional to 15,464.21, 21,340.77 and 8,390.69 is: 11,579.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,464.21 : 21,340.77 = 8,390.69 : x
  2. Step 2: Convert to fraction form
    15,464.21/21,340.77 = 8,390.69/x
  3. Step 3: Cross multiply
    15,464.21x = 21,340.77 × 8,390.69
  4. Step 4: Simplify right side
    15,464.21x = 179,063,785.43
  5. Step 5: Solve for x
    x = 179,063,785.43/15,464.21
  6. Step 6: Final answer
    x = 11,579.24

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Half scale
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Double scale
Find fourth proportional to 15,465.21, 21,342.15 and 8,391.69
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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.