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Finding the Fourth Proportional to 28,874.76, 39,879.98 and 19,426.92

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Solution

The fourth proportional to 28,874.76, 39,879.98 and 19,426.92 is: 26,831.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,874.76 : 39,879.98 = 19,426.92 : x
  2. Step 2: Convert to fraction form
    28,874.76/39,879.98 = 19,426.92/x
  3. Step 3: Cross multiply
    28,874.76x = 39,879.98 × 19,426.92
  4. Step 4: Simplify right side
    28,874.76x = 774,745,181.06
  5. Step 5: Solve for x
    x = 774,745,181.06/28,874.76
  6. Step 6: Final answer
    x = 26,831.22

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Double scale
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Similar ratio
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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.