Home / 3,898.47-5,379.77-2,130.08

Finding the Fourth Proportional to 3,898.47, 5,379.77 and 2,130.08

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Solution

The fourth proportional to 3,898.47, 5,379.77 and 2,130.08 is: 2,939.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.47 : 5,379.77 = 2,130.08 : x
  2. Step 2: Convert to fraction form
    3,898.47/5,379.77 = 2,130.08/x
  3. Step 3: Cross multiply
    3,898.47x = 5,379.77 × 2,130.08
  4. Step 4: Simplify right side
    3,898.47x = 11,459,332.99
  5. Step 5: Solve for x
    x = 11,459,332.99/3,898.47
  6. Step 6: Final answer
    x = 2,939.44

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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.