Home / 13,438.12-20,151.48-5,113.48

Finding the Fourth Proportional to 13,438.12, 20,151.48 and 5,113.48

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Solution

The fourth proportional to 13,438.12, 20,151.48 and 5,113.48 is: 7,668.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.12 : 20,151.48 = 5,113.48 : x
  2. Step 2: Convert to fraction form
    13,438.12/20,151.48 = 5,113.48/x
  3. Step 3: Cross multiply
    13,438.12x = 20,151.48 × 5,113.48
  4. Step 4: Simplify right side
    13,438.12x = 103,044,189.95
  5. Step 5: Solve for x
    x = 103,044,189.95/13,438.12
  6. Step 6: Final answer
    x = 7,668.05

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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.