Home / 19,716.90-27,193.89-12,643.98

Finding the Fourth Proportional to 19,716.90, 27,193.89 and 12,643.98

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Solution

The fourth proportional to 19,716.90, 27,193.89 and 12,643.98 is: 17,438.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,716.90 : 27,193.89 = 12,643.98 : x
  2. Step 2: Convert to fraction form
    19,716.90/27,193.89 = 12,643.98/x
  3. Step 3: Cross multiply
    19,716.90x = 27,193.89 × 12,643.98
  4. Step 4: Simplify right side
    19,716.90x = 343,839,001.28
  5. Step 5: Solve for x
    x = 343,839,001.28/19,716.90
  6. Step 6: Final answer
    x = 17,438.80

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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.