Home / 21,110.79-29,131.57-11,679.35

Finding the Fourth Proportional to 21,110.79, 29,131.57 and 11,679.35

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Solution

The fourth proportional to 21,110.79, 29,131.57 and 11,679.35 is: 16,116.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.79 : 29,131.57 = 11,679.35 : x
  2. Step 2: Convert to fraction form
    21,110.79/29,131.57 = 11,679.35/x
  3. Step 3: Cross multiply
    21,110.79x = 29,131.57 × 11,679.35
  4. Step 4: Simplify right side
    21,110.79x = 340,237,656.42
  5. Step 5: Solve for x
    x = 340,237,656.42/21,110.79
  6. Step 6: Final answer
    x = 16,116.77

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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.