Home / 20,670.97-31,006.47-8,977.81

Finding the Fourth Proportional to 20,670.97, 31,006.47 and 8,977.81

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Solution

The fourth proportional to 20,670.97, 31,006.47 and 8,977.81 is: 13,466.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.97 : 31,006.47 = 8,977.81 : x
  2. Step 2: Convert to fraction form
    20,670.97/31,006.47 = 8,977.81/x
  3. Step 3: Cross multiply
    20,670.97x = 31,006.47 × 8,977.81
  4. Step 4: Simplify right side
    20,670.97x = 278,370,196.43
  5. Step 5: Solve for x
    x = 278,370,196.43/20,670.97
  6. Step 6: Final answer
    x = 13,466.72

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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.