Home / 15,515.28-21,412.88-9,227.60

Finding the Fourth Proportional to 15,515.28, 21,412.88 and 9,227.60

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Solution

The fourth proportional to 15,515.28, 21,412.88 and 9,227.60 is: 12,735.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.28 : 21,412.88 = 9,227.60 : x
  2. Step 2: Convert to fraction form
    15,515.28/21,412.88 = 9,227.60/x
  3. Step 3: Cross multiply
    15,515.28x = 21,412.88 × 9,227.60
  4. Step 4: Simplify right side
    15,515.28x = 197,589,491.49
  5. Step 5: Solve for x
    x = 197,589,491.49/15,515.28
  6. Step 6: Final answer
    x = 12,735.15

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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.