Home / 21,880.80-30,164.40-15,573.60

Finding the Fourth Proportional to 21,880.80, 30,164.40 and 15,573.60

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Solution

The fourth proportional to 21,880.80, 30,164.40 and 15,573.60 is: 21,469.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,880.80 : 30,164.40 = 15,573.60 : x
  2. Step 2: Convert to fraction form
    21,880.80/30,164.40 = 15,573.60/x
  3. Step 3: Cross multiply
    21,880.80x = 30,164.40 × 15,573.60
  4. Step 4: Simplify right side
    21,880.80x = 469,768,299.84
  5. Step 5: Solve for x
    x = 469,768,299.84/21,880.80
  6. Step 6: Final answer
    x = 21,469.43

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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.