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Finding the Fourth Proportional to 18,686.83, 25,788.02 and 10,188.88

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Solution

The fourth proportional to 18,686.83, 25,788.02 and 10,188.88 is: 14,060.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,686.83 : 25,788.02 = 10,188.88 : x
  2. Step 2: Convert to fraction form
    18,686.83/25,788.02 = 10,188.88/x
  3. Step 3: Cross multiply
    18,686.83x = 25,788.02 × 10,188.88
  4. Step 4: Simplify right side
    18,686.83x = 262,751,002.22
  5. Step 5: Solve for x
    x = 262,751,002.22/18,686.83
  6. Step 6: Final answer
    x = 14,060.76

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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.