Home / 12,656.79-18,984.51-3,890.57

Finding the Fourth Proportional to 12,656.79, 18,984.51 and 3,890.57

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Solution

The fourth proportional to 12,656.79, 18,984.51 and 3,890.57 is: 5,835.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,656.79 : 18,984.51 = 3,890.57 : x
  2. Step 2: Convert to fraction form
    12,656.79/18,984.51 = 3,890.57/x
  3. Step 3: Cross multiply
    12,656.79x = 18,984.51 × 3,890.57
  4. Step 4: Simplify right side
    12,656.79x = 73,860,470.15
  5. Step 5: Solve for x
    x = 73,860,470.15/12,656.79
  6. Step 6: Final answer
    x = 5,835.64

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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.