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Finding the Fourth Proportional to 6,620.84, 9,928.58 and 2,920.46

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Solution

The fourth proportional to 6,620.84, 9,928.58 and 2,920.46 is: 4,379.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.84 : 9,928.58 = 2,920.46 : x
  2. Step 2: Convert to fraction form
    6,620.84/9,928.58 = 2,920.46/x
  3. Step 3: Cross multiply
    6,620.84x = 9,928.58 × 2,920.46
  4. Step 4: Simplify right side
    6,620.84x = 28,995,956.50
  5. Step 5: Solve for x
    x = 28,995,956.50/6,620.84
  6. Step 6: Final answer
    x = 4,379.50

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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.