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Finding the Fourth Proportional to 7,114.96, 10,671.18 and 1,920.16

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Solution

The fourth proportional to 7,114.96, 10,671.18 and 1,920.16 is: 2,879.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,114.96 : 10,671.18 = 1,920.16 : x
  2. Step 2: Convert to fraction form
    7,114.96/10,671.18 = 1,920.16/x
  3. Step 3: Cross multiply
    7,114.96x = 10,671.18 × 1,920.16
  4. Step 4: Simplify right side
    7,114.96x = 20,490,372.99
  5. Step 5: Solve for x
    x = 20,490,372.99/7,114.96
  6. Step 6: Final answer
    x = 2,879.90

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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.