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Finding the Fourth Proportional to 15,643.91, 21,593.12 and 8,933.19

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Solution

The fourth proportional to 15,643.91, 21,593.12 and 8,933.19 is: 12,330.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,643.91 : 21,593.12 = 8,933.19 : x
  2. Step 2: Convert to fraction form
    15,643.91/21,593.12 = 8,933.19/x
  3. Step 3: Cross multiply
    15,643.91x = 21,593.12 × 8,933.19
  4. Step 4: Simplify right side
    15,643.91x = 192,895,443.65
  5. Step 5: Solve for x
    x = 192,895,443.65/15,643.91
  6. Step 6: Final answer
    x = 12,330.39

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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.