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Finding the Fourth Proportional to 12,975.86, 17,907.75 and 7,311.71

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Solution

The fourth proportional to 12,975.86, 17,907.75 and 7,311.71 is: 10,090.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,975.86 : 17,907.75 = 7,311.71 : x
  2. Step 2: Convert to fraction form
    12,975.86/17,907.75 = 7,311.71/x
  3. Step 3: Cross multiply
    12,975.86x = 17,907.75 × 7,311.71
  4. Step 4: Simplify right side
    12,975.86x = 130,936,319.52
  5. Step 5: Solve for x
    x = 130,936,319.52/12,975.86
  6. Step 6: Final answer
    x = 10,090.76

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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.