Home / 28,610.07-42,786.19-21,857.71

Finding the Fourth Proportional to 28,610.07, 42,786.19 and 21,857.71

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Solution

The fourth proportional to 28,610.07, 42,786.19 and 21,857.71 is: 32,688.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,610.07 : 42,786.19 = 21,857.71 : x
  2. Step 2: Convert to fraction form
    28,610.07/42,786.19 = 21,857.71/x
  3. Step 3: Cross multiply
    28,610.07x = 42,786.19 × 21,857.71
  4. Step 4: Simplify right side
    28,610.07x = 935,208,133.02
  5. Step 5: Solve for x
    x = 935,208,133.02/28,610.07
  6. Step 6: Final answer
    x = 32,688.08

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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.