Home / 15,621.44-21,564.60-9,963.80

Finding the Fourth Proportional to 15,621.44, 21,564.60 and 9,963.80

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Solution

The fourth proportional to 15,621.44, 21,564.60 and 9,963.80 is: 13,754.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621.44 : 21,564.60 = 9,963.80 : x
  2. Step 2: Convert to fraction form
    15,621.44/21,564.60 = 9,963.80/x
  3. Step 3: Cross multiply
    15,621.44x = 21,564.60 × 9,963.80
  4. Step 4: Simplify right side
    15,621.44x = 214,865,361.48
  5. Step 5: Solve for x
    x = 214,865,361.48/15,621.44
  6. Step 6: Final answer
    x = 13,754.52

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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.