Home / 21,119.58-29,144.98-11,688.12

Finding the Fourth Proportional to 21,119.58, 29,144.98 and 11,688.12

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Solution

The fourth proportional to 21,119.58, 29,144.98 and 11,688.12 is: 16,129.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.58 : 29,144.98 = 11,688.12 : x
  2. Step 2: Convert to fraction form
    21,119.58/29,144.98 = 11,688.12/x
  3. Step 3: Cross multiply
    21,119.58x = 29,144.98 × 11,688.12
  4. Step 4: Simplify right side
    21,119.58x = 340,650,023.64
  5. Step 5: Solve for x
    x = 340,650,023.64/21,119.58
  6. Step 6: Final answer
    x = 16,129.58

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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.