Home / 21,023.06-31,540.25-6,985.35

Finding the Fourth Proportional to 21,023.06, 31,540.25 and 6,985.35

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Solution

The fourth proportional to 21,023.06, 31,540.25 and 6,985.35 is: 10,479.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,023.06 : 31,540.25 = 6,985.35 : x
  2. Step 2: Convert to fraction form
    21,023.06/31,540.25 = 6,985.35/x
  3. Step 3: Cross multiply
    21,023.06x = 31,540.25 × 6,985.35
  4. Step 4: Simplify right side
    21,023.06x = 220,319,702.80
  5. Step 5: Solve for x
    x = 220,319,702.80/21,023.06
  6. Step 6: Final answer
    x = 10,479.91

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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.