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Finding the Fourth Proportional to 21,653.93, 29,874.04 and 12,698.17

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Solution

The fourth proportional to 21,653.93, 29,874.04 and 12,698.17 is: 17,518.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,653.93 : 29,874.04 = 12,698.17 : x
  2. Step 2: Convert to fraction form
    21,653.93/29,874.04 = 12,698.17/x
  3. Step 3: Cross multiply
    21,653.93x = 29,874.04 × 12,698.17
  4. Step 4: Simplify right side
    21,653.93x = 379,345,567.79
  5. Step 5: Solve for x
    x = 379,345,567.79/21,653.93
  6. Step 6: Final answer
    x = 17,518.55

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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.