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Finding the Fourth Proportional to 21,790.84, 32,678.88 and 7,750.24

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Solution

The fourth proportional to 21,790.84, 32,678.88 and 7,750.24 is: 11,622.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,790.84 : 32,678.88 = 7,750.24 : x
  2. Step 2: Convert to fraction form
    21,790.84/32,678.88 = 7,750.24/x
  3. Step 3: Cross multiply
    21,790.84x = 32,678.88 × 7,750.24
  4. Step 4: Simplify right side
    21,790.84x = 253,269,162.93
  5. Step 5: Solve for x
    x = 253,269,162.93/21,790.84
  6. Step 6: Final answer
    x = 11,622.74

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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.