Home / 55,431.72-83,155.78-20,368.64

Finding the Fourth Proportional to 55,431.72, 83,155.78 and 20,368.64

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Solution

The fourth proportional to 55,431.72, 83,155.78 and 20,368.64 is: 30,555.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,431.72 : 83,155.78 = 20,368.64 : x
  2. Step 2: Convert to fraction form
    55,431.72/83,155.78 = 20,368.64/x
  3. Step 3: Cross multiply
    55,431.72x = 83,155.78 × 20,368.64
  4. Step 4: Simplify right side
    55,431.72x = 1,693,770,405.55
  5. Step 5: Solve for x
    x = 1,693,770,405.55/55,431.72
  6. Step 6: Final answer
    x = 30,555.98

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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.