Home / 15,464.20-21,340.71-8,390.68

Finding the Fourth Proportional to 15,464.20, 21,340.71 and 8,390.68

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Solution

The fourth proportional to 15,464.20, 21,340.71 and 8,390.68 is: 11,579.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,464.20 : 21,340.71 = 8,390.68 : x
  2. Step 2: Convert to fraction form
    15,464.20/21,340.71 = 8,390.68/x
  3. Step 3: Cross multiply
    15,464.20x = 21,340.71 × 8,390.68
  4. Step 4: Simplify right side
    15,464.20x = 179,063,068.58
  5. Step 5: Solve for x
    x = 179,063,068.58/15,464.20
  6. Step 6: Final answer
    x = 11,579.20

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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.