Home / 21,561.96-29,755.20-12,130.50

Finding the Fourth Proportional to 21,561.96, 29,755.20 and 12,130.50

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Solution

The fourth proportional to 21,561.96, 29,755.20 and 12,130.50 is: 16,739.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,561.96 : 29,755.20 = 12,130.50 : x
  2. Step 2: Convert to fraction form
    21,561.96/29,755.20 = 12,130.50/x
  3. Step 3: Cross multiply
    21,561.96x = 29,755.20 × 12,130.50
  4. Step 4: Simplify right side
    21,561.96x = 360,945,453.60
  5. Step 5: Solve for x
    x = 360,945,453.60/21,561.96
  6. Step 6: Final answer
    x = 16,739.92

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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.