Home / 21,245.80-29,316.36-11,812.54

Finding the Fourth Proportional to 21,245.80, 29,316.36 and 11,812.54

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Solution

The fourth proportional to 21,245.80, 29,316.36 and 11,812.54 is: 16,299.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,245.80 : 29,316.36 = 11,812.54 : x
  2. Step 2: Convert to fraction form
    21,245.80/29,316.36 = 11,812.54/x
  3. Step 3: Cross multiply
    21,245.80x = 29,316.36 × 11,812.54
  4. Step 4: Simplify right side
    21,245.80x = 346,300,675.15
  5. Step 5: Solve for x
    x = 346,300,675.15/21,245.80
  6. Step 6: Final answer
    x = 16,299.72

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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.