Home / 2,121.51-2,927.16-1,271.05

Finding the Fourth Proportional to 2,121.51, 2,927.16 and 1,271.05

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Solution

The fourth proportional to 2,121.51, 2,927.16 and 1,271.05 is: 1,753.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.51 : 2,927.16 = 1,271.05 : x
  2. Step 2: Convert to fraction form
    2,121.51/2,927.16 = 1,271.05/x
  3. Step 3: Cross multiply
    2,121.51x = 2,927.16 × 1,271.05
  4. Step 4: Simplify right side
    2,121.51x = 3,720,566.72
  5. Step 5: Solve for x
    x = 3,720,566.72/2,121.51
  6. Step 6: Final answer
    x = 1,753.74

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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.