Home / 2,106.42-2,905.11-1,581.54

Finding the Fourth Proportional to 2,106.42, 2,905.11 and 1,581.54

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Solution

The fourth proportional to 2,106.42, 2,905.11 and 1,581.54 is: 2,181.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,106.42 : 2,905.11 = 1,581.54 : x
  2. Step 2: Convert to fraction form
    2,106.42/2,905.11 = 1,581.54/x
  3. Step 3: Cross multiply
    2,106.42x = 2,905.11 × 1,581.54
  4. Step 4: Simplify right side
    2,106.42x = 4,594,547.67
  5. Step 5: Solve for x
    x = 4,594,547.67/2,106.42
  6. Step 6: Final answer
    x = 2,181.21

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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.