Home / 2,130.17-2,939.67-1,291.01

Finding the Fourth Proportional to 2,130.17, 2,939.67 and 1,291.01

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Solution

The fourth proportional to 2,130.17, 2,939.67 and 1,291.01 is: 1,781.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.17 : 2,939.67 = 1,291.01 : x
  2. Step 2: Convert to fraction form
    2,130.17/2,939.67 = 1,291.01/x
  3. Step 3: Cross multiply
    2,130.17x = 2,939.67 × 1,291.01
  4. Step 4: Simplify right side
    2,130.17x = 3,795,128.67
  5. Step 5: Solve for x
    x = 3,795,128.67/2,130.17
  6. Step 6: Final answer
    x = 1,781.61

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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.