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Finding the Fourth Proportional to 15,794.34, 21,786.75 and 9,505.50

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Solution

The fourth proportional to 15,794.34, 21,786.75 and 9,505.50 is: 13,111.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,794.34 : 21,786.75 = 9,505.50 : x
  2. Step 2: Convert to fraction form
    15,794.34/21,786.75 = 9,505.50/x
  3. Step 3: Cross multiply
    15,794.34x = 21,786.75 × 9,505.50
  4. Step 4: Simplify right side
    15,794.34x = 207,093,952.13
  5. Step 5: Solve for x
    x = 207,093,952.13/15,794.34
  6. Step 6: Final answer
    x = 13,111.91

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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.