Home / 19,571.20-26,976.80-15,315.04

Finding the Fourth Proportional to 19,571.20, 26,976.80 and 15,315.04

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Solution

The fourth proportional to 19,571.20, 26,976.80 and 15,315.04 is: 21,110.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,571.20 : 26,976.80 = 15,315.04 : x
  2. Step 2: Convert to fraction form
    19,571.20/26,976.80 = 15,315.04/x
  3. Step 3: Cross multiply
    19,571.20x = 26,976.80 × 15,315.04
  4. Step 4: Simplify right side
    19,571.20x = 413,150,771.07
  5. Step 5: Solve for x
    x = 413,150,771.07/19,571.20
  6. Step 6: Final answer
    x = 21,110.14

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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.