Home / 19,895.85-27,451.31-12,813.75

Finding the Fourth Proportional to 19,895.85, 27,451.31 and 12,813.75

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Solution

The fourth proportional to 19,895.85, 27,451.31 and 12,813.75 is: 17,679.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,895.85 : 27,451.31 = 12,813.75 : x
  2. Step 2: Convert to fraction form
    19,895.85/27,451.31 = 12,813.75/x
  3. Step 3: Cross multiply
    19,895.85x = 27,451.31 × 12,813.75
  4. Step 4: Simplify right side
    19,895.85x = 351,754,159.44
  5. Step 5: Solve for x
    x = 351,754,159.44/19,895.85
  6. Step 6: Final answer
    x = 17,679.78

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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.