Home / 21,153-29,191.20-12,769.56

Finding the Fourth Proportional to 21,153, 29,191.20 and 12,769.56

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Solution

The fourth proportional to 21,153, 29,191.20 and 12,769.56 is: 17,622.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153 : 29,191.20 = 12,769.56 : x
  2. Step 2: Convert to fraction form
    21,153/29,191.20 = 12,769.56/x
  3. Step 3: Cross multiply
    21,153x = 29,191.20 × 12,769.56
  4. Step 4: Simplify right side
    21,153x = 372,758,779.87
  5. Step 5: Solve for x
    x = 372,758,779.87/21,153
  6. Step 6: Final answer
    x = 17,622.03

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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.