Home / 52,511.16-78,771.64-20,913.60

Finding the Fourth Proportional to 52,511.16, 78,771.64 and 20,913.60

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Solution

The fourth proportional to 52,511.16, 78,771.64 and 20,913.60 is: 31,372.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,511.16 : 78,771.64 = 20,913.60 : x
  2. Step 2: Convert to fraction form
    52,511.16/78,771.64 = 20,913.60/x
  3. Step 3: Cross multiply
    52,511.16x = 78,771.64 × 20,913.60
  4. Step 4: Simplify right side
    52,511.16x = 1,647,398,570.30
  5. Step 5: Solve for x
    x = 1,647,398,570.30/52,511.16
  6. Step 6: Final answer
    x = 31,372.35

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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.