Home / 20,986.06-31,479.10-7,135.06

Finding the Fourth Proportional to 20,986.06, 31,479.10 and 7,135.06

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Solution

The fourth proportional to 20,986.06, 31,479.10 and 7,135.06 is: 10,702.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.06 : 31,479.10 = 7,135.06 : x
  2. Step 2: Convert to fraction form
    20,986.06/31,479.10 = 7,135.06/x
  3. Step 3: Cross multiply
    20,986.06x = 31,479.10 × 7,135.06
  4. Step 4: Simplify right side
    20,986.06x = 224,605,267.25
  5. Step 5: Solve for x
    x = 224,605,267.25/20,986.06
  6. Step 6: Final answer
    x = 10,702.59

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1.5x scale

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.