Home / 15,464.28-21,340.70-8,390.70

Finding the Fourth Proportional to 15,464.28, 21,340.70 and 8,390.70

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Solution

The fourth proportional to 15,464.28, 21,340.70 and 8,390.70 is: 11,579.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,464.28 : 21,340.70 = 8,390.70 : x
  2. Step 2: Convert to fraction form
    15,464.28/21,340.70 = 8,390.70/x
  3. Step 3: Cross multiply
    15,464.28x = 21,340.70 × 8,390.70
  4. Step 4: Simplify right side
    15,464.28x = 179,063,262.83
  5. Step 5: Solve for x
    x = 179,063,262.83/15,464.28
  6. Step 6: Final answer
    x = 11,579.16

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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.