Home / 20,702.36-31,033.50-8,218.28

Finding the Fourth Proportional to 20,702.36, 31,033.50 and 8,218.28

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Solution

The fourth proportional to 20,702.36, 31,033.50 and 8,218.28 is: 12,319.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.36 : 31,033.50 = 8,218.28 : x
  2. Step 2: Convert to fraction form
    20,702.36/31,033.50 = 8,218.28/x
  3. Step 3: Cross multiply
    20,702.36x = 31,033.50 × 8,218.28
  4. Step 4: Simplify right side
    20,702.36x = 255,041,992.38
  5. Step 5: Solve for x
    x = 255,041,992.38/20,702.36
  6. Step 6: Final answer
    x = 12,319.46

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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.