Home / 2,130.90-2,940.45-1,571.67

Finding the Fourth Proportional to 2,130.90, 2,940.45 and 1,571.67

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Solution

The fourth proportional to 2,130.90, 2,940.45 and 1,571.67 is: 2,168.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.90 : 2,940.45 = 1,571.67 : x
  2. Step 2: Convert to fraction form
    2,130.90/2,940.45 = 1,571.67/x
  3. Step 3: Cross multiply
    2,130.90x = 2,940.45 × 1,571.67
  4. Step 4: Simplify right side
    2,130.90x = 4,621,417.05
  5. Step 5: Solve for x
    x = 4,621,417.05/2,130.90
  6. Step 6: Final answer
    x = 2,168.76

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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.