Home / 21,489.50-29,654.61-11,928.67

Finding the Fourth Proportional to 21,489.50, 29,654.61 and 11,928.67

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Solution

The fourth proportional to 21,489.50, 29,654.61 and 11,928.67 is: 16,461.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,489.50 : 29,654.61 = 11,928.67 : x
  2. Step 2: Convert to fraction form
    21,489.50/29,654.61 = 11,928.67/x
  3. Step 3: Cross multiply
    21,489.50x = 29,654.61 × 11,928.67
  4. Step 4: Simplify right side
    21,489.50x = 353,739,937.80
  5. Step 5: Solve for x
    x = 353,739,937.80/21,489.50
  6. Step 6: Final answer
    x = 16,461.06

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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.