Home / 18,928.47-28,396.76-5,781.81

Finding the Fourth Proportional to 18,928.47, 28,396.76 and 5,781.81

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Solution

The fourth proportional to 18,928.47, 28,396.76 and 5,781.81 is: 8,673.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928.47 : 28,396.76 = 5,781.81 : x
  2. Step 2: Convert to fraction form
    18,928.47/28,396.76 = 5,781.81/x
  3. Step 3: Cross multiply
    18,928.47x = 28,396.76 × 5,781.81
  4. Step 4: Simplify right side
    18,928.47x = 164,184,670.94
  5. Step 5: Solve for x
    x = 164,184,670.94/18,928.47
  6. Step 6: Final answer
    x = 8,673.95

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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.