Home / 15,301.71-21,121.63-9,645.99

Finding the Fourth Proportional to 15,301.71, 21,121.63 and 9,645.99

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Solution

The fourth proportional to 15,301.71, 21,121.63 and 9,645.99 is: 13,314.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,301.71 : 21,121.63 = 9,645.99 : x
  2. Step 2: Convert to fraction form
    15,301.71/21,121.63 = 9,645.99/x
  3. Step 3: Cross multiply
    15,301.71x = 21,121.63 × 9,645.99
  4. Step 4: Simplify right side
    15,301.71x = 203,738,928.44
  5. Step 5: Solve for x
    x = 203,738,928.44/15,301.71
  6. Step 6: Final answer
    x = 13,314.78

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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.