Home / 13,980.39-20,977.88-5,666.55

Finding the Fourth Proportional to 13,980.39, 20,977.88 and 5,666.55

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Solution

The fourth proportional to 13,980.39, 20,977.88 and 5,666.55 is: 8,502.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,980.39 : 20,977.88 = 5,666.55 : x
  2. Step 2: Convert to fraction form
    13,980.39/20,977.88 = 5,666.55/x
  3. Step 3: Cross multiply
    13,980.39x = 20,977.88 × 5,666.55
  4. Step 4: Simplify right side
    13,980.39x = 118,872,177.58
  5. Step 5: Solve for x
    x = 118,872,177.58/13,980.39
  6. Step 6: Final answer
    x = 8,502.78

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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.