Home / 21,070.66-31,605.77-12,180.33

Finding the Fourth Proportional to 21,070.66, 31,605.77 and 12,180.33

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Solution

The fourth proportional to 21,070.66, 31,605.77 and 12,180.33 is: 18,270.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,070.66 : 31,605.77 = 12,180.33 : x
  2. Step 2: Convert to fraction form
    21,070.66/31,605.77 = 12,180.33/x
  3. Step 3: Cross multiply
    21,070.66x = 31,605.77 × 12,180.33
  4. Step 4: Simplify right side
    21,070.66x = 384,968,489.57
  5. Step 5: Solve for x
    x = 384,968,489.57/21,070.66
  6. Step 6: Final answer
    x = 18,270.36

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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.