Home / 21,851.36-30,150.36-13,890.68

Finding the Fourth Proportional to 21,851.36, 30,150.36 and 13,890.68

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Solution

The fourth proportional to 21,851.36, 30,150.36 and 13,890.68 is: 19,166.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,851.36 : 30,150.36 = 13,890.68 : x
  2. Step 2: Convert to fraction form
    21,851.36/30,150.36 = 13,890.68/x
  3. Step 3: Cross multiply
    21,851.36x = 30,150.36 × 13,890.68
  4. Step 4: Simplify right side
    21,851.36x = 418,809,002.64
  5. Step 5: Solve for x
    x = 418,809,002.64/21,851.36
  6. Step 6: Final answer
    x = 19,166.27

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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.