Home / 13,140.78-19,710.95-3,279.93

Finding the Fourth Proportional to 13,140.78, 19,710.95 and 3,279.93

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Solution

The fourth proportional to 13,140.78, 19,710.95 and 3,279.93 is: 4,919.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.78 : 19,710.95 = 3,279.93 : x
  2. Step 2: Convert to fraction form
    13,140.78/19,710.95 = 3,279.93/x
  3. Step 3: Cross multiply
    13,140.78x = 19,710.95 × 3,279.93
  4. Step 4: Simplify right side
    13,140.78x = 64,650,519.83
  5. Step 5: Solve for x
    x = 64,650,519.83/13,140.78
  6. Step 6: Final answer
    x = 4,919.84

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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.