Home / 18,946.39-28,419.68-4,905.43

Finding the Fourth Proportional to 18,946.39, 28,419.68 and 4,905.43

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Solution

The fourth proportional to 18,946.39, 28,419.68 and 4,905.43 is: 7,358.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,946.39 : 28,419.68 = 4,905.43 : x
  2. Step 2: Convert to fraction form
    18,946.39/28,419.68 = 4,905.43/x
  3. Step 3: Cross multiply
    18,946.39x = 28,419.68 × 4,905.43
  4. Step 4: Simplify right side
    18,946.39x = 139,410,726.34
  5. Step 5: Solve for x
    x = 139,410,726.34/18,946.39
  6. Step 6: Final answer
    x = 7,358.17

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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.