Home / 21,255.63-31,869.77-10,162.07

Finding the Fourth Proportional to 21,255.63, 31,869.77 and 10,162.07

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Solution

The fourth proportional to 21,255.63, 31,869.77 and 10,162.07 is: 15,236.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.63 : 31,869.77 = 10,162.07 : x
  2. Step 2: Convert to fraction form
    21,255.63/31,869.77 = 10,162.07/x
  3. Step 3: Cross multiply
    21,255.63x = 31,869.77 × 10,162.07
  4. Step 4: Simplify right side
    21,255.63x = 323,862,833.62
  5. Step 5: Solve for x
    x = 323,862,833.62/21,255.63
  6. Step 6: Final answer
    x = 15,236.57

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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.