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Finding the Fourth Proportional to 18,657.50, 25,749.20 and 13,933.58

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Solution

The fourth proportional to 18,657.50, 25,749.20 and 13,933.58 is: 19,229.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,657.50 : 25,749.20 = 13,933.58 : x
  2. Step 2: Convert to fraction form
    18,657.50/25,749.20 = 13,933.58/x
  3. Step 3: Cross multiply
    18,657.50x = 25,749.20 × 13,933.58
  4. Step 4: Simplify right side
    18,657.50x = 358,778,444.22
  5. Step 5: Solve for x
    x = 358,778,444.22/18,657.50
  6. Step 6: Final answer
    x = 19,229.72

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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.