Home / 3,898.60-5,379.98-2,130.22

Finding the Fourth Proportional to 3,898.60, 5,379.98 and 2,130.22

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Solution

The fourth proportional to 3,898.60, 5,379.98 and 2,130.22 is: 2,939.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.60 : 5,379.98 = 2,130.22 : x
  2. Step 2: Convert to fraction form
    3,898.60/5,379.98 = 2,130.22/x
  3. Step 3: Cross multiply
    3,898.60x = 5,379.98 × 2,130.22
  4. Step 4: Simplify right side
    3,898.60x = 11,460,541.00
  5. Step 5: Solve for x
    x = 11,460,541.00/3,898.60
  6. Step 6: Final answer
    x = 2,939.66

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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.