Home / 1,921.56-2,647.26-1,570.20

Finding the Fourth Proportional to 1,921.56, 2,647.26 and 1,570.20

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Solution

The fourth proportional to 1,921.56, 2,647.26 and 1,570.20 is: 2,163.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.56 : 2,647.26 = 1,570.20 : x
  2. Step 2: Convert to fraction form
    1,921.56/2,647.26 = 1,570.20/x
  3. Step 3: Cross multiply
    1,921.56x = 2,647.26 × 1,570.20
  4. Step 4: Simplify right side
    1,921.56x = 4,156,727.65
  5. Step 5: Solve for x
    x = 4,156,727.65/1,921.56
  6. Step 6: Final answer
    x = 2,163.20

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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.