Home / 13,320.42-19,980.64-3,458.87

Finding the Fourth Proportional to 13,320.42, 19,980.64 and 3,458.87

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Solution

The fourth proportional to 13,320.42, 19,980.64 and 3,458.87 is: 5,188.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320.42 : 19,980.64 = 3,458.87 : x
  2. Step 2: Convert to fraction form
    13,320.42/19,980.64 = 3,458.87/x
  3. Step 3: Cross multiply
    13,320.42x = 19,980.64 × 3,458.87
  4. Step 4: Simplify right side
    13,320.42x = 69,110,436.28
  5. Step 5: Solve for x
    x = 69,110,436.28/13,320.42
  6. Step 6: Final answer
    x = 5,188.31

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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.