Home / 2,021.79-2,790.32-1,137.76

Finding the Fourth Proportional to 2,021.79, 2,790.32 and 1,137.76

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Solution

The fourth proportional to 2,021.79, 2,790.32 and 1,137.76 is: 1,570.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,021.79 : 2,790.32 = 1,137.76 : x
  2. Step 2: Convert to fraction form
    2,021.79/2,790.32 = 1,137.76/x
  3. Step 3: Cross multiply
    2,021.79x = 2,790.32 × 1,137.76
  4. Step 4: Simplify right side
    2,021.79x = 3,174,715.34
  5. Step 5: Solve for x
    x = 3,174,715.34/2,021.79
  6. Step 6: Final answer
    x = 1,570.25

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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.