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Finding the Fourth Proportional to 55,358.40, 83,021.40 and 19,815.60

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Solution

The fourth proportional to 55,358.40, 83,021.40 and 19,815.60 is: 29,717.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,358.40 : 83,021.40 = 19,815.60 : x
  2. Step 2: Convert to fraction form
    55,358.40/83,021.40 = 19,815.60/x
  3. Step 3: Cross multiply
    55,358.40x = 83,021.40 × 19,815.60
  4. Step 4: Simplify right side
    55,358.40x = 1,645,118,853.84
  5. Step 5: Solve for x
    x = 1,645,118,853.84/55,358.40
  6. Step 6: Final answer
    x = 29,717.60

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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.