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Finding the Fourth Proportional to 15,593.79, 21,520.71 and 8,881.52

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Solution

The fourth proportional to 15,593.79, 21,520.71 and 8,881.52 is: 12,257.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,593.79 : 21,520.71 = 8,881.52 : x
  2. Step 2: Convert to fraction form
    15,593.79/21,520.71 = 8,881.52/x
  3. Step 3: Cross multiply
    15,593.79x = 21,520.71 × 8,881.52
  4. Step 4: Simplify right side
    15,593.79x = 191,136,571.87
  5. Step 5: Solve for x
    x = 191,136,571.87/15,593.79
  6. Step 6: Final answer
    x = 12,257.22

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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.