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Finding the Fourth Proportional to 13,695.80, 18,900.74 and 8,029.76

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Solution

The fourth proportional to 13,695.80, 18,900.74 and 8,029.76 is: 11,081.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,695.80 : 18,900.74 = 8,029.76 : x
  2. Step 2: Convert to fraction form
    13,695.80/18,900.74 = 8,029.76/x
  3. Step 3: Cross multiply
    13,695.80x = 18,900.74 × 8,029.76
  4. Step 4: Simplify right side
    13,695.80x = 151,768,358.77
  5. Step 5: Solve for x
    x = 151,768,358.77/13,695.80
  6. Step 6: Final answer
    x = 11,081.38

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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.