Home / 21,070.36-31,611.30-7,220.44

Finding the Fourth Proportional to 21,070.36, 31,611.30 and 7,220.44

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Solution

The fourth proportional to 21,070.36, 31,611.30 and 7,220.44 is: 10,832.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,070.36 : 31,611.30 = 7,220.44 : x
  2. Step 2: Convert to fraction form
    21,070.36/31,611.30 = 7,220.44/x
  3. Step 3: Cross multiply
    21,070.36x = 31,611.30 × 7,220.44
  4. Step 4: Simplify right side
    21,070.36x = 228,247,494.97
  5. Step 5: Solve for x
    x = 228,247,494.97/21,070.36
  6. Step 6: Final answer
    x = 10,832.63

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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.