Home / 21,118.89-29,147.16-12,164.67

Finding the Fourth Proportional to 21,118.89, 29,147.16 and 12,164.67

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Solution

The fourth proportional to 21,118.89, 29,147.16 and 12,164.67 is: 16,789.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.89 : 29,147.16 = 12,164.67 : x
  2. Step 2: Convert to fraction form
    21,118.89/29,147.16 = 12,164.67/x
  3. Step 3: Cross multiply
    21,118.89x = 29,147.16 × 12,164.67
  4. Step 4: Simplify right side
    21,118.89x = 354,565,582.84
  5. Step 5: Solve for x
    x = 354,565,582.84/21,118.89
  6. Step 6: Final answer
    x = 16,789.03

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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.