Home / 18,946.64-28,420.05-4,905.68

Finding the Fourth Proportional to 18,946.64, 28,420.05 and 4,905.68

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Solution

The fourth proportional to 18,946.64, 28,420.05 and 4,905.68 is: 7,358.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,946.64 : 28,420.05 = 4,905.68 : x
  2. Step 2: Convert to fraction form
    18,946.64/28,420.05 = 4,905.68/x
  3. Step 3: Cross multiply
    18,946.64x = 28,420.05 × 4,905.68
  4. Step 4: Simplify right side
    18,946.64x = 139,419,670.88
  5. Step 5: Solve for x
    x = 139,419,670.88/18,946.64
  6. Step 6: Final answer
    x = 7,358.54

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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.