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Finding the Fourth Proportional to 15,589, 21,512.58 and 8,515.24

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Solution

The fourth proportional to 15,589, 21,512.58 and 8,515.24 is: 11,750.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,589 : 21,512.58 = 8,515.24 : x
  2. Step 2: Convert to fraction form
    15,589/21,512.58 = 8,515.24/x
  3. Step 3: Cross multiply
    15,589x = 21,512.58 × 8,515.24
  4. Step 4: Simplify right side
    15,589x = 183,184,781.72
  5. Step 5: Solve for x
    x = 183,184,781.72/15,589
  6. Step 6: Final answer
    x = 11,750.90

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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.