Home / 13,140.78-19,700.73-7,587.84

Finding the Fourth Proportional to 13,140.78, 19,700.73 and 7,587.84

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Solution

The fourth proportional to 13,140.78, 19,700.73 and 7,587.84 is: 11,375.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.78 : 19,700.73 = 7,587.84 : x
  2. Step 2: Convert to fraction form
    13,140.78/19,700.73 = 7,587.84/x
  3. Step 3: Cross multiply
    13,140.78x = 19,700.73 × 7,587.84
  4. Step 4: Simplify right side
    13,140.78x = 149,485,987.12
  5. Step 5: Solve for x
    x = 149,485,987.12/13,140.78
  6. Step 6: Final answer
    x = 11,375.73

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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.