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Finding the Fourth Proportional to 21,646.84, 29,873.22 and 12,695.08

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Solution

The fourth proportional to 21,646.84, 29,873.22 and 12,695.08 is: 17,519.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,646.84 : 29,873.22 = 12,695.08 : x
  2. Step 2: Convert to fraction form
    21,646.84/29,873.22 = 12,695.08/x
  3. Step 3: Cross multiply
    21,646.84x = 29,873.22 × 12,695.08
  4. Step 4: Simplify right side
    21,646.84x = 379,242,917.76
  5. Step 5: Solve for x
    x = 379,242,917.76/21,646.84
  6. Step 6: Final answer
    x = 17,519.55

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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.