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Finding the Fourth Proportional to 18,946.10, 28,419.91 and 7,098.64

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Solution

The fourth proportional to 18,946.10, 28,419.91 and 7,098.64 is: 10,648.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,946.10 : 28,419.91 = 7,098.64 : x
  2. Step 2: Convert to fraction form
    18,946.10/28,419.91 = 7,098.64/x
  3. Step 3: Cross multiply
    18,946.10x = 28,419.91 × 7,098.64
  4. Step 4: Simplify right side
    18,946.10x = 201,742,661.06
  5. Step 5: Solve for x
    x = 201,742,661.06/18,946.10
  6. Step 6: Final answer
    x = 10,648.24

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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.