Home / 1,921.23-2,651.47-1,135.13

Finding the Fourth Proportional to 1,921.23, 2,651.47 and 1,135.13

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Solution

The fourth proportional to 1,921.23, 2,651.47 and 1,135.13 is: 1,566.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.23 : 2,651.47 = 1,135.13 : x
  2. Step 2: Convert to fraction form
    1,921.23/2,651.47 = 1,135.13/x
  3. Step 3: Cross multiply
    1,921.23x = 2,651.47 × 1,135.13
  4. Step 4: Simplify right side
    1,921.23x = 3,009,747.05
  5. Step 5: Solve for x
    x = 3,009,747.05/1,921.23
  6. Step 6: Final answer
    x = 1,566.57

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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.