Home / 2,121-2,927.10-1,189.56

Finding the Fourth Proportional to 2,121, 2,927.10 and 1,189.56

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Solution

The fourth proportional to 2,121, 2,927.10 and 1,189.56 is: 1,641.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121 : 2,927.10 = 1,189.56 : x
  2. Step 2: Convert to fraction form
    2,121/2,927.10 = 1,189.56/x
  3. Step 3: Cross multiply
    2,121x = 2,927.10 × 1,189.56
  4. Step 4: Simplify right side
    2,121x = 3,481,961.08
  5. Step 5: Solve for x
    x = 3,481,961.08/2,121
  6. Step 6: Final answer
    x = 1,641.66

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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.