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Finding the Fourth Proportional to 7,114.98, 9,818.67 and 3,928.28

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Solution

The fourth proportional to 7,114.98, 9,818.67 and 3,928.28 is: 5,421.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,114.98 : 9,818.67 = 3,928.28 : x
  2. Step 2: Convert to fraction form
    7,114.98/9,818.67 = 3,928.28/x
  3. Step 3: Cross multiply
    7,114.98x = 9,818.67 × 3,928.28
  4. Step 4: Simplify right side
    7,114.98x = 38,570,435.89
  5. Step 5: Solve for x
    x = 38,570,435.89/7,114.98
  6. Step 6: Final answer
    x = 5,421.02

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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.