Home / 18,821.56-25,986-12,851.06

Finding the Fourth Proportional to 18,821.56, 25,986 and 12,851.06

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Solution

The fourth proportional to 18,821.56, 25,986 and 12,851.06 is: 17,742.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,821.56 : 25,986 = 12,851.06 : x
  2. Step 2: Convert to fraction form
    18,821.56/25,986 = 12,851.06/x
  3. Step 3: Cross multiply
    18,821.56x = 25,986 × 12,851.06
  4. Step 4: Simplify right side
    18,821.56x = 333,947,645.16
  5. Step 5: Solve for x
    x = 333,947,645.16/18,821.56
  6. Step 6: Final answer
    x = 17,742.82

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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.