Home / 39,405.60-54,379.98-21,500.64

Finding the Fourth Proportional to 39,405.60, 54,379.98 and 21,500.64

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Solution

The fourth proportional to 39,405.60, 54,379.98 and 21,500.64 is: 29,671.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,405.60 : 54,379.98 = 21,500.64 : x
  2. Step 2: Convert to fraction form
    39,405.60/54,379.98 = 21,500.64/x
  3. Step 3: Cross multiply
    39,405.60x = 54,379.98 × 21,500.64
  4. Step 4: Simplify right side
    39,405.60x = 1,169,204,373.19
  5. Step 5: Solve for x
    x = 1,169,204,373.19/39,405.60
  6. Step 6: Final answer
    x = 29,671.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.