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Finding the Fourth Proportional to 15,464.55, 21,341.07 and 8,390.97

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Solution

The fourth proportional to 15,464.55, 21,341.07 and 8,390.97 is: 11,579.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,464.55 : 21,341.07 = 8,390.97 : x
  2. Step 2: Convert to fraction form
    15,464.55/21,341.07 = 8,390.97/x
  3. Step 3: Cross multiply
    15,464.55x = 21,341.07 × 8,390.97
  4. Step 4: Simplify right side
    15,464.55x = 179,072,278.14
  5. Step 5: Solve for x
    x = 179,072,278.14/15,464.55
  6. Step 6: Final answer
    x = 11,579.53

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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.