Home / 21,378.64-29,501.95-11,687.73

Finding the Fourth Proportional to 21,378.64, 29,501.95 and 11,687.73

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Solution

The fourth proportional to 21,378.64, 29,501.95 and 11,687.73 is: 16,128.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.64 : 29,501.95 = 11,687.73 : x
  2. Step 2: Convert to fraction form
    21,378.64/29,501.95 = 11,687.73/x
  3. Step 3: Cross multiply
    21,378.64x = 29,501.95 × 11,687.73
  4. Step 4: Simplify right side
    21,378.64x = 344,810,826.07
  5. Step 5: Solve for x
    x = 344,810,826.07/21,378.64
  6. Step 6: Final answer
    x = 16,128.75

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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.