Home / 20,988.36-28,954.80-12,600

Finding the Fourth Proportional to 20,988.36, 28,954.80 and 12,600

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Solution

The fourth proportional to 20,988.36, 28,954.80 and 12,600 is: 17,382.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988.36 : 28,954.80 = 12,600 : x
  2. Step 2: Convert to fraction form
    20,988.36/28,954.80 = 12,600/x
  3. Step 3: Cross multiply
    20,988.36x = 28,954.80 × 12,600
  4. Step 4: Simplify right side
    20,988.36x = 364,830,480
  5. Step 5: Solve for x
    x = 364,830,480/20,988.36
  6. Step 6: Final answer
    x = 17,382.51

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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.