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Finding the Fourth Proportional to 7,830.84, 10,807.92 and 4,688.85

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Solution

The fourth proportional to 7,830.84, 10,807.92 and 4,688.85 is: 6,471.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,830.84 : 10,807.92 = 4,688.85 : x
  2. Step 2: Convert to fraction form
    7,830.84/10,807.92 = 4,688.85/x
  3. Step 3: Cross multiply
    7,830.84x = 10,807.92 × 4,688.85
  4. Step 4: Simplify right side
    7,830.84x = 50,676,715.69
  5. Step 5: Solve for x
    x = 50,676,715.69/7,830.84
  6. Step 6: Final answer
    x = 6,471.43

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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.