Home / 21,935.88-30,285.36-15,219.36

Finding the Fourth Proportional to 21,935.88, 30,285.36 and 15,219.36

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Solution

The fourth proportional to 21,935.88, 30,285.36 and 15,219.36 is: 21,012.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,935.88 : 30,285.36 = 15,219.36 : x
  2. Step 2: Convert to fraction form
    21,935.88/30,285.36 = 15,219.36/x
  3. Step 3: Cross multiply
    21,935.88x = 30,285.36 × 15,219.36
  4. Step 4: Simplify right side
    21,935.88x = 460,923,796.57
  5. Step 5: Solve for x
    x = 460,923,796.57/21,935.88
  6. Step 6: Final answer
    x = 21,012.32

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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.