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Finding the Fourth Proportional to 30,085.76, 45,104.32 and 12,568.64

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Solution

The fourth proportional to 30,085.76, 45,104.32 and 12,568.64 is: 18,842.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,085.76 : 45,104.32 = 12,568.64 : x
  2. Step 2: Convert to fraction form
    30,085.76/45,104.32 = 12,568.64/x
  3. Step 3: Cross multiply
    30,085.76x = 45,104.32 × 12,568.64
  4. Step 4: Simplify right side
    30,085.76x = 566,899,960.52
  5. Step 5: Solve for x
    x = 566,899,960.52/30,085.76
  6. Step 6: Final answer
    x = 18,842.80

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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.