Home / 21,079.13-31,561.67-13,162.68

Finding the Fourth Proportional to 21,079.13, 31,561.67 and 13,162.68

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Solution

The fourth proportional to 21,079.13, 31,561.67 and 13,162.68 is: 19,708.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,079.13 : 31,561.67 = 13,162.68 : x
  2. Step 2: Convert to fraction form
    21,079.13/31,561.67 = 13,162.68/x
  3. Step 3: Cross multiply
    21,079.13x = 31,561.67 × 13,162.68
  4. Step 4: Simplify right side
    21,079.13x = 415,436,096.66
  5. Step 5: Solve for x
    x = 415,436,096.66/21,079.13
  6. Step 6: Final answer
    x = 19,708.41

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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.