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Finding the Fourth Proportional to 21,787.55, 32,678.23 and 6,994.55

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Solution

The fourth proportional to 21,787.55, 32,678.23 and 6,994.55 is: 10,490.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787.55 : 32,678.23 = 6,994.55 : x
  2. Step 2: Convert to fraction form
    21,787.55/32,678.23 = 6,994.55/x
  3. Step 3: Cross multiply
    21,787.55x = 32,678.23 × 6,994.55
  4. Step 4: Simplify right side
    21,787.55x = 228,569,513.65
  5. Step 5: Solve for x
    x = 228,569,513.65/21,787.55
  6. Step 6: Final answer
    x = 10,490.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.