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Finding the Fourth Proportional to 28,079.64, 38,733.66 and 18,143.64

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Solution

The fourth proportional to 28,079.64, 38,733.66 and 18,143.64 is: 25,027.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,079.64 : 38,733.66 = 18,143.64 : x
  2. Step 2: Convert to fraction form
    28,079.64/38,733.66 = 18,143.64/x
  3. Step 3: Cross multiply
    28,079.64x = 38,733.66 × 18,143.64
  4. Step 4: Simplify right side
    28,079.64x = 702,769,582.92
  5. Step 5: Solve for x
    x = 702,769,582.92/28,079.64
  6. Step 6: Final answer
    x = 25,027.73

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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.