Home / 21,119.04-29,142.74-11,687.76

Finding the Fourth Proportional to 21,119.04, 29,142.74 and 11,687.76

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Solution

The fourth proportional to 21,119.04, 29,142.74 and 11,687.76 is: 16,128.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.04 : 29,142.74 = 11,687.76 : x
  2. Step 2: Convert to fraction form
    21,119.04/29,142.74 = 11,687.76/x
  3. Step 3: Cross multiply
    21,119.04x = 29,142.74 × 11,687.76
  4. Step 4: Simplify right side
    21,119.04x = 340,613,350.86
  5. Step 5: Solve for x
    x = 340,613,350.86/21,119.04
  6. Step 6: Final answer
    x = 16,128.26

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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.