Home / 21,004.05-28,986.12-11,572.61

Finding the Fourth Proportional to 21,004.05, 28,986.12 and 11,572.61

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Solution

The fourth proportional to 21,004.05, 28,986.12 and 11,572.61 is: 15,970.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004.05 : 28,986.12 = 11,572.61 : x
  2. Step 2: Convert to fraction form
    21,004.05/28,986.12 = 11,572.61/x
  3. Step 3: Cross multiply
    21,004.05x = 28,986.12 × 11,572.61
  4. Step 4: Simplify right side
    21,004.05x = 335,445,062.17
  5. Step 5: Solve for x
    x = 335,445,062.17/21,004.05
  6. Step 6: Final answer
    x = 15,970.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.