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Finding the Fourth Proportional to 15,468, 21,345.85 and 8,394.42

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Solution

The fourth proportional to 15,468, 21,345.85 and 8,394.42 is: 11,584.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,468 : 21,345.85 = 8,394.42 : x
  2. Step 2: Convert to fraction form
    15,468/21,345.85 = 8,394.42/x
  3. Step 3: Cross multiply
    15,468x = 21,345.85 × 8,394.42
  4. Step 4: Simplify right side
    15,468x = 179,186,030.16
  5. Step 5: Solve for x
    x = 179,186,030.16/15,468
  6. Step 6: Final answer
    x = 11,584.31

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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.