Home / 21,010.12-31,519.66-10,485.80

Finding the Fourth Proportional to 21,010.12, 31,519.66 and 10,485.80

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Solution

The fourth proportional to 21,010.12, 31,519.66 and 10,485.80 is: 15,730.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.12 : 31,519.66 = 10,485.80 : x
  2. Step 2: Convert to fraction form
    21,010.12/31,519.66 = 10,485.80/x
  3. Step 3: Cross multiply
    21,010.12x = 31,519.66 × 10,485.80
  4. Step 4: Simplify right side
    21,010.12x = 330,508,850.83
  5. Step 5: Solve for x
    x = 330,508,850.83/21,010.12
  6. Step 6: Final answer
    x = 15,730.94

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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.