Home / 2,151.44-2,971.40-1,918.16

Finding the Fourth Proportional to 2,151.44, 2,971.40 and 1,918.16

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Solution

The fourth proportional to 2,151.44, 2,971.40 and 1,918.16 is: 2,649.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.44 : 2,971.40 = 1,918.16 : x
  2. Step 2: Convert to fraction form
    2,151.44/2,971.40 = 1,918.16/x
  3. Step 3: Cross multiply
    2,151.44x = 2,971.40 × 1,918.16
  4. Step 4: Simplify right side
    2,151.44x = 5,699,620.62
  5. Step 5: Solve for x
    x = 5,699,620.62/2,151.44
  6. Step 6: Final answer
    x = 2,649.21

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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.