Home / 15,065.40-20,810.07-11,571.78

Finding the Fourth Proportional to 15,065.40, 20,810.07 and 11,571.78

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Solution

The fourth proportional to 15,065.40, 20,810.07 and 11,571.78 is: 15,984.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,065.40 : 20,810.07 = 11,571.78 : x
  2. Step 2: Convert to fraction form
    15,065.40/20,810.07 = 11,571.78/x
  3. Step 3: Cross multiply
    15,065.40x = 20,810.07 × 11,571.78
  4. Step 4: Simplify right side
    15,065.40x = 240,809,551.82
  5. Step 5: Solve for x
    x = 240,809,551.82/15,065.40
  6. Step 6: Final answer
    x = 15,984.28

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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.