Home / 2,118.61-2,923.67-1,187.11

Finding the Fourth Proportional to 2,118.61, 2,923.67 and 1,187.11

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Solution

The fourth proportional to 2,118.61, 2,923.67 and 1,187.11 is: 1,638.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.61 : 2,923.67 = 1,187.11 : x
  2. Step 2: Convert to fraction form
    2,118.61/2,923.67 = 1,187.11/x
  3. Step 3: Cross multiply
    2,118.61x = 2,923.67 × 1,187.11
  4. Step 4: Simplify right side
    2,118.61x = 3,470,717.89
  5. Step 5: Solve for x
    x = 3,470,717.89/2,118.61
  6. Step 6: Final answer
    x = 1,638.21

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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.