Home / 20,741.36-31,125-15,108.64

Finding the Fourth Proportional to 20,741.36, 31,125 and 15,108.64

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Solution

The fourth proportional to 20,741.36, 31,125 and 15,108.64 is: 22,672.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,741.36 : 31,125 = 15,108.64 : x
  2. Step 2: Convert to fraction form
    20,741.36/31,125 = 15,108.64/x
  3. Step 3: Cross multiply
    20,741.36x = 31,125 × 15,108.64
  4. Step 4: Simplify right side
    20,741.36x = 470,256,420
  5. Step 5: Solve for x
    x = 470,256,420/20,741.36
  6. Step 6: Final answer
    x = 22,672.40

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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.