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Finding the Fourth Proportional to 7,925.69, 10,928.25 and 6,428.94

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Solution

The fourth proportional to 7,925.69, 10,928.25 and 6,428.94 is: 8,864.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,925.69 : 10,928.25 = 6,428.94 : x
  2. Step 2: Convert to fraction form
    7,925.69/10,928.25 = 6,428.94/x
  3. Step 3: Cross multiply
    7,925.69x = 10,928.25 × 6,428.94
  4. Step 4: Simplify right side
    7,925.69x = 70,257,063.56
  5. Step 5: Solve for x
    x = 70,257,063.56/7,925.69
  6. Step 6: Final answer
    x = 8,864.48

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1.5x scale

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.