Home / 12,605.90-18,903.35-3,838.75

Finding the Fourth Proportional to 12,605.90, 18,903.35 and 3,838.75

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Solution

The fourth proportional to 12,605.90, 18,903.35 and 3,838.75 is: 5,756.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,605.90 : 18,903.35 = 3,838.75 : x
  2. Step 2: Convert to fraction form
    12,605.90/18,903.35 = 3,838.75/x
  3. Step 3: Cross multiply
    12,605.90x = 18,903.35 × 3,838.75
  4. Step 4: Simplify right side
    12,605.90x = 72,565,197.15
  5. Step 5: Solve for x
    x = 72,565,197.15/12,605.90
  6. Step 6: Final answer
    x = 5,756.45

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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.