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Finding the Fourth Proportional to 15,472.86, 21,351.93 and 8,399.10

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Solution

The fourth proportional to 15,472.86, 21,351.93 and 8,399.10 is: 11,590.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,472.86 : 21,351.93 = 8,399.10 : x
  2. Step 2: Convert to fraction form
    15,472.86/21,351.93 = 8,399.10/x
  3. Step 3: Cross multiply
    15,472.86x = 21,351.93 × 8,399.10
  4. Step 4: Simplify right side
    15,472.86x = 179,336,995.26
  5. Step 5: Solve for x
    x = 179,336,995.26/15,472.86
  6. Step 6: Final answer
    x = 11,590.42

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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.