Home / 2,657.72-3,668.21-2,130.11

Finding the Fourth Proportional to 2,657.72, 3,668.21 and 2,130.11

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Solution

The fourth proportional to 2,657.72, 3,668.21 and 2,130.11 is: 2,939.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,657.72 : 3,668.21 = 2,130.11 : x
  2. Step 2: Convert to fraction form
    2,657.72/3,668.21 = 2,130.11/x
  3. Step 3: Cross multiply
    2,657.72x = 3,668.21 × 2,130.11
  4. Step 4: Simplify right side
    2,657.72x = 7,813,661.81
  5. Step 5: Solve for x
    x = 7,813,661.81/2,657.72
  6. Step 6: Final answer
    x = 2,939.99

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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.