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Finding the Fourth Proportional to 15,468.49, 21,346.90 and 8,394.89

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Solution

The fourth proportional to 15,468.49, 21,346.90 and 8,394.89 is: 11,585.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,468.49 : 21,346.90 = 8,394.89 : x
  2. Step 2: Convert to fraction form
    15,468.49/21,346.90 = 8,394.89/x
  3. Step 3: Cross multiply
    15,468.49x = 21,346.90 × 8,394.89
  4. Step 4: Simplify right side
    15,468.49x = 179,204,877.34
  5. Step 5: Solve for x
    x = 179,204,877.34/15,468.49
  6. Step 6: Final answer
    x = 11,585.16

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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.