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Finding the Fourth Proportional to 7,120.84, 10,679.24 and 2,955.70

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Solution

The fourth proportional to 7,120.84, 10,679.24 and 2,955.70 is: 4,432.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.84 : 10,679.24 = 2,955.70 : x
  2. Step 2: Convert to fraction form
    7,120.84/10,679.24 = 2,955.70/x
  3. Step 3: Cross multiply
    7,120.84x = 10,679.24 × 2,955.70
  4. Step 4: Simplify right side
    7,120.84x = 31,564,576.27
  5. Step 5: Solve for x
    x = 31,564,576.27/7,120.84
  6. Step 6: Final answer
    x = 4,432.70

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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.