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Finding the Fourth Proportional to 27,578.97, 38,060.97 and 15,643.35

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Solution

The fourth proportional to 27,578.97, 38,060.97 and 15,643.35 is: 21,588.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,578.97 : 38,060.97 = 15,643.35 : x
  2. Step 2: Convert to fraction form
    27,578.97/38,060.97 = 15,643.35/x
  3. Step 3: Cross multiply
    27,578.97x = 38,060.97 × 15,643.35
  4. Step 4: Simplify right side
    27,578.97x = 595,401,075.05
  5. Step 5: Solve for x
    x = 595,401,075.05/27,578.97
  6. Step 6: Final answer
    x = 21,588.95

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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.