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Finding the Fourth Proportional to 14,515.05, 20,031 and 8,143.06

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Solution

The fourth proportional to 14,515.05, 20,031 and 8,143.06 is: 11,237.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,515.05 : 20,031 = 8,143.06 : x
  2. Step 2: Convert to fraction form
    14,515.05/20,031 = 8,143.06/x
  3. Step 3: Cross multiply
    14,515.05x = 20,031 × 8,143.06
  4. Step 4: Simplify right side
    14,515.05x = 163,113,634.86
  5. Step 5: Solve for x
    x = 163,113,634.86/14,515.05
  6. Step 6: Final answer
    x = 11,237.55

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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.