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Finding the Fourth Proportional to 5,145.64, 7,101.60 and 2,907.60

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Solution

The fourth proportional to 5,145.64, 7,101.60 and 2,907.60 is: 4,012.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.64 : 7,101.60 = 2,907.60 : x
  2. Step 2: Convert to fraction form
    5,145.64/7,101.60 = 2,907.60/x
  3. Step 3: Cross multiply
    5,145.64x = 7,101.60 × 2,907.60
  4. Step 4: Simplify right side
    5,145.64x = 20,648,612.16
  5. Step 5: Solve for x
    x = 20,648,612.16/5,145.64
  6. Step 6: Final answer
    x = 4,012.84

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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.