Home / 7,112.81-10,669.23-1,918.69

Finding the Fourth Proportional to 7,112.81, 10,669.23 and 1,918.69

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Solution

The fourth proportional to 7,112.81, 10,669.23 and 1,918.69 is: 2,878.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,112.81 : 10,669.23 = 1,918.69 : x
  2. Step 2: Convert to fraction form
    7,112.81/10,669.23 = 1,918.69/x
  3. Step 3: Cross multiply
    7,112.81x = 10,669.23 × 1,918.69
  4. Step 4: Simplify right side
    7,112.81x = 20,470,918.24
  5. Step 5: Solve for x
    x = 20,470,918.24/7,112.81
  6. Step 6: Final answer
    x = 2,878.03

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1.5x scale

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.