Home / 13,261.80-19,886.36-7,716.64

Finding the Fourth Proportional to 13,261.80, 19,886.36 and 7,716.64

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Solution

The fourth proportional to 13,261.80, 19,886.36 and 7,716.64 is: 11,571.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,261.80 : 19,886.36 = 7,716.64 : x
  2. Step 2: Convert to fraction form
    13,261.80/19,886.36 = 7,716.64/x
  3. Step 3: Cross multiply
    13,261.80x = 19,886.36 × 7,716.64
  4. Step 4: Simplify right side
    13,261.80x = 153,455,881.03
  5. Step 5: Solve for x
    x = 153,455,881.03/13,261.80
  6. Step 6: Final answer
    x = 11,571.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.