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Finding the Fourth Proportional to 18,870.94, 28,305.76 and 4,831.09

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Solution

The fourth proportional to 18,870.94, 28,305.76 and 4,831.09 is: 7,246.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.94 : 28,305.76 = 4,831.09 : x
  2. Step 2: Convert to fraction form
    18,870.94/28,305.76 = 4,831.09/x
  3. Step 3: Cross multiply
    18,870.94x = 28,305.76 × 4,831.09
  4. Step 4: Simplify right side
    18,870.94x = 136,747,633.31
  5. Step 5: Solve for x
    x = 136,747,633.31/18,870.94
  6. Step 6: Final answer
    x = 7,246.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.