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Finding the Fourth Proportional to 7,155.08, 9,872.61 and 3,968.25

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Solution

The fourth proportional to 7,155.08, 9,872.61 and 3,968.25 is: 5,475.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155.08 : 9,872.61 = 3,968.25 : x
  2. Step 2: Convert to fraction form
    7,155.08/9,872.61 = 3,968.25/x
  3. Step 3: Cross multiply
    7,155.08x = 9,872.61 × 3,968.25
  4. Step 4: Simplify right side
    7,155.08x = 39,176,984.63
  5. Step 5: Solve for x
    x = 39,176,984.63/7,155.08
  6. Step 6: Final answer
    x = 5,475.41

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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.