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Finding the Fourth Proportional to 14,857.95, 20,503.89 and 8,143.86

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Solution

The fourth proportional to 14,857.95, 20,503.89 and 8,143.86 is: 11,238.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,857.95 : 20,503.89 = 8,143.86 : x
  2. Step 2: Convert to fraction form
    14,857.95/20,503.89 = 8,143.86/x
  3. Step 3: Cross multiply
    14,857.95x = 20,503.89 × 8,143.86
  4. Step 4: Simplify right side
    14,857.95x = 166,980,809.62
  5. Step 5: Solve for x
    x = 166,980,809.62/14,857.95
  6. Step 6: Final answer
    x = 11,238.48

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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.