Home / 7,985.39-11,976.70-2,140.63

Finding the Fourth Proportional to 7,985.39, 11,976.70 and 2,140.63

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Solution

The fourth proportional to 7,985.39, 11,976.70 and 2,140.63 is: 3,210.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985.39 : 11,976.70 = 2,140.63 : x
  2. Step 2: Convert to fraction form
    7,985.39/11,976.70 = 2,140.63/x
  3. Step 3: Cross multiply
    7,985.39x = 11,976.70 × 2,140.63
  4. Step 4: Simplify right side
    7,985.39x = 25,637,683.32
  5. Step 5: Solve for x
    x = 25,637,683.32/7,985.39
  6. Step 6: Final answer
    x = 3,210.57

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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.