Home / 42,851.89-64,319.39-20,680.86

Finding the Fourth Proportional to 42,851.89, 64,319.39 and 20,680.86

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Solution

The fourth proportional to 42,851.89, 64,319.39 and 20,680.86 is: 31,041.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,851.89 : 64,319.39 = 20,680.86 : x
  2. Step 2: Convert to fraction form
    42,851.89/64,319.39 = 20,680.86/x
  3. Step 3: Cross multiply
    42,851.89x = 64,319.39 × 20,680.86
  4. Step 4: Simplify right side
    42,851.89x = 1,330,180,299.88
  5. Step 5: Solve for x
    x = 1,330,180,299.88/42,851.89
  6. Step 6: Final answer
    x = 31,041.34

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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.