Home / 21,958.17-30,301.58-13,005.77

Finding the Fourth Proportional to 21,958.17, 30,301.58 and 13,005.77

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Solution

The fourth proportional to 21,958.17, 30,301.58 and 13,005.77 is: 17,947.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,958.17 : 30,301.58 = 13,005.77 : x
  2. Step 2: Convert to fraction form
    21,958.17/30,301.58 = 13,005.77/x
  3. Step 3: Cross multiply
    21,958.17x = 30,301.58 × 13,005.77
  4. Step 4: Simplify right side
    21,958.17x = 394,095,163.58
  5. Step 5: Solve for x
    x = 394,095,163.58/21,958.17
  6. Step 6: Final answer
    x = 17,947.54

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1.5x scale

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.