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Finding the Fourth Proportional to 21,959.84, 32,940.88 and 6,378.72

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Solution

The fourth proportional to 21,959.84, 32,940.88 and 6,378.72 is: 9,568.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,959.84 : 32,940.88 = 6,378.72 : x
  2. Step 2: Convert to fraction form
    21,959.84/32,940.88 = 6,378.72/x
  3. Step 3: Cross multiply
    21,959.84x = 32,940.88 × 6,378.72
  4. Step 4: Simplify right side
    21,959.84x = 210,120,650.07
  5. Step 5: Solve for x
    x = 210,120,650.07/21,959.84
  6. Step 6: Final answer
    x = 9,568.41

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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.