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Finding the Fourth Proportional to 21,283.88, 29,322.84 and 16,805.99

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Solution

The fourth proportional to 21,283.88, 29,322.84 and 16,805.99 is: 23,153.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,283.88 : 29,322.84 = 16,805.99 : x
  2. Step 2: Convert to fraction form
    21,283.88/29,322.84 = 16,805.99/x
  3. Step 3: Cross multiply
    21,283.88x = 29,322.84 × 16,805.99
  4. Step 4: Simplify right side
    21,283.88x = 492,799,492.14
  5. Step 5: Solve for x
    x = 492,799,492.14/21,283.88
  6. Step 6: Final answer
    x = 23,153.65

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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.