Home / 5,145.66-7,100.82-2,907.45

Finding the Fourth Proportional to 5,145.66, 7,100.82 and 2,907.45

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Solution

The fourth proportional to 5,145.66, 7,100.82 and 2,907.45 is: 4,012.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.66 : 7,100.82 = 2,907.45 : x
  2. Step 2: Convert to fraction form
    5,145.66/7,100.82 = 2,907.45/x
  3. Step 3: Cross multiply
    5,145.66x = 7,100.82 × 2,907.45
  4. Step 4: Simplify right side
    5,145.66x = 20,645,279.11
  5. Step 5: Solve for x
    x = 20,645,279.11/5,145.66
  6. Step 6: Final answer
    x = 4,012.17

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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.