Home / 18,821.64-25,977.29-12,851.13

Finding the Fourth Proportional to 18,821.64, 25,977.29 and 12,851.13

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Solution

The fourth proportional to 18,821.64, 25,977.29 and 12,851.13 is: 17,736.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,821.64 : 25,977.29 = 12,851.13 : x
  2. Step 2: Convert to fraction form
    18,821.64/25,977.29 = 12,851.13/x
  3. Step 3: Cross multiply
    18,821.64x = 25,977.29 × 12,851.13
  4. Step 4: Simplify right side
    18,821.64x = 333,837,466.58
  5. Step 5: Solve for x
    x = 333,837,466.58/18,821.64
  6. Step 6: Final answer
    x = 17,736.90

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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.