Home / 21,405.22-31,983.95-15,453.85

Finding the Fourth Proportional to 21,405.22, 31,983.95 and 15,453.85

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Solution

The fourth proportional to 21,405.22, 31,983.95 and 15,453.85 is: 23,091.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.22 : 31,983.95 = 15,453.85 : x
  2. Step 2: Convert to fraction form
    21,405.22/31,983.95 = 15,453.85/x
  3. Step 3: Cross multiply
    21,405.22x = 31,983.95 × 15,453.85
  4. Step 4: Simplify right side
    21,405.22x = 494,275,165.71
  5. Step 5: Solve for x
    x = 494,275,165.71/21,405.22
  6. Step 6: Final answer
    x = 23,091.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.