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Finding the Fourth Proportional to 7,114.16, 10,671.24 and 1,920.56

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Solution

The fourth proportional to 7,114.16, 10,671.24 and 1,920.56 is: 2,880.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,114.16 : 10,671.24 = 1,920.56 : x
  2. Step 2: Convert to fraction form
    7,114.16/10,671.24 = 1,920.56/x
  3. Step 3: Cross multiply
    7,114.16x = 10,671.24 × 1,920.56
  4. Step 4: Simplify right side
    7,114.16x = 20,494,756.69
  5. Step 5: Solve for x
    x = 20,494,756.69/7,114.16
  6. Step 6: Final answer
    x = 2,880.84

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Double scale
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Similar ratio
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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.