Home / 28,920.60-43,370.10-20,129.40

Finding the Fourth Proportional to 28,920.60, 43,370.10 and 20,129.40

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Solution

The fourth proportional to 28,920.60, 43,370.10 and 20,129.40 is: 30,186.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,920.60 : 43,370.10 = 20,129.40 : x
  2. Step 2: Convert to fraction form
    28,920.60/43,370.10 = 20,129.40/x
  3. Step 3: Cross multiply
    28,920.60x = 43,370.10 × 20,129.40
  4. Step 4: Simplify right side
    28,920.60x = 873,014,090.94
  5. Step 5: Solve for x
    x = 873,014,090.94/28,920.60
  6. Step 6: Final answer
    x = 30,186.58

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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.