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Finding the Fourth Proportional to 20,551.94, 30,827.91 and 8,707.58

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Solution

The fourth proportional to 20,551.94, 30,827.91 and 8,707.58 is: 13,061.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,551.94 : 30,827.91 = 8,707.58 : x
  2. Step 2: Convert to fraction form
    20,551.94/30,827.91 = 8,707.58/x
  3. Step 3: Cross multiply
    20,551.94x = 30,827.91 × 8,707.58
  4. Step 4: Simplify right side
    20,551.94x = 268,436,492.56
  5. Step 5: Solve for x
    x = 268,436,492.56/20,551.94
  6. Step 6: Final answer
    x = 13,061.37

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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.