Home / 8,072.51-12,106.87-3,140.15

Finding the Fourth Proportional to 8,072.51, 12,106.87 and 3,140.15

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Solution

The fourth proportional to 8,072.51, 12,106.87 and 3,140.15 is: 4,709.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,072.51 : 12,106.87 = 3,140.15 : x
  2. Step 2: Convert to fraction form
    8,072.51/12,106.87 = 3,140.15/x
  3. Step 3: Cross multiply
    8,072.51x = 12,106.87 × 3,140.15
  4. Step 4: Simplify right side
    8,072.51x = 38,017,319.45
  5. Step 5: Solve for x
    x = 38,017,319.45/8,072.51
  6. Step 6: Final answer
    x = 4,709.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.