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Finding the Fourth Proportional to 15,553, 21,462.42 and 8,479.36

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Solution

The fourth proportional to 15,553, 21,462.42 and 8,479.36 is: 11,701.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,553 : 21,462.42 = 8,479.36 : x
  2. Step 2: Convert to fraction form
    15,553/21,462.42 = 8,479.36/x
  3. Step 3: Cross multiply
    15,553x = 21,462.42 × 8,479.36
  4. Step 4: Simplify right side
    15,553x = 181,987,585.65
  5. Step 5: Solve for x
    x = 181,987,585.65/15,553
  6. Step 6: Final answer
    x = 11,701.12

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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.