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Finding the Fourth Proportional to 22,368, 30,868.65 and 12,809.64

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Solution

The fourth proportional to 22,368, 30,868.65 and 12,809.64 is: 17,677.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,368 : 30,868.65 = 12,809.64 : x
  2. Step 2: Convert to fraction form
    22,368/30,868.65 = 12,809.64/x
  3. Step 3: Cross multiply
    22,368x = 30,868.65 × 12,809.64
  4. Step 4: Simplify right side
    22,368x = 395,416,293.79
  5. Step 5: Solve for x
    x = 395,416,293.79/22,368
  6. Step 6: Final answer
    x = 17,677.77

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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.