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Finding the Fourth Proportional to 55,368.90, 83,053.36 and 13,815.90

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Solution

The fourth proportional to 55,368.90, 83,053.36 and 13,815.90 is: 20,723.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,368.90 : 83,053.36 = 13,815.90 : x
  2. Step 2: Convert to fraction form
    55,368.90/83,053.36 = 13,815.90/x
  3. Step 3: Cross multiply
    55,368.90x = 83,053.36 × 13,815.90
  4. Step 4: Simplify right side
    55,368.90x = 1,147,456,916.42
  5. Step 5: Solve for x
    x = 1,147,456,916.42/55,368.90
  6. Step 6: Final answer
    x = 20,723.85

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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.