Home / 20,918.94-28,868.66-11,487.51

Finding the Fourth Proportional to 20,918.94, 28,868.66 and 11,487.51

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Solution

The fourth proportional to 20,918.94, 28,868.66 and 11,487.51 is: 15,853.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.94 : 28,868.66 = 11,487.51 : x
  2. Step 2: Convert to fraction form
    20,918.94/28,868.66 = 11,487.51/x
  3. Step 3: Cross multiply
    20,918.94x = 28,868.66 × 11,487.51
  4. Step 4: Simplify right side
    20,918.94x = 331,628,963.00
  5. Step 5: Solve for x
    x = 331,628,963.00/20,918.94
  6. Step 6: Final answer
    x = 15,853.05

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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.