Home / 31,072.85-42,866.87-20,997.62

Finding the Fourth Proportional to 31,072.85, 42,866.87 and 20,997.62

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Solution

The fourth proportional to 31,072.85, 42,866.87 and 20,997.62 is: 28,967.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,072.85 : 42,866.87 = 20,997.62 : x
  2. Step 2: Convert to fraction form
    31,072.85/42,866.87 = 20,997.62/x
  3. Step 3: Cross multiply
    31,072.85x = 42,866.87 × 20,997.62
  4. Step 4: Simplify right side
    31,072.85x = 900,101,927.53
  5. Step 5: Solve for x
    x = 900,101,927.53/31,072.85
  6. Step 6: Final answer
    x = 28,967.48

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1.5x scale

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.