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Finding the Fourth Proportional to 15,331.61, 22,986.79 and 7,820.59

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Solution

The fourth proportional to 15,331.61, 22,986.79 and 7,820.59 is: 11,725.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,331.61 : 22,986.79 = 7,820.59 : x
  2. Step 2: Convert to fraction form
    15,331.61/22,986.79 = 7,820.59/x
  3. Step 3: Cross multiply
    15,331.61x = 22,986.79 × 7,820.59
  4. Step 4: Simplify right side
    15,331.61x = 179,770,260.01
  5. Step 5: Solve for x
    x = 179,770,260.01/15,331.61
  6. Step 6: Final answer
    x = 11,725.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.