Home / 21,561.81-29,755.26-12,130.37

Finding the Fourth Proportional to 21,561.81, 29,755.26 and 12,130.37

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Solution

The fourth proportional to 21,561.81, 29,755.26 and 12,130.37 is: 16,739.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,561.81 : 29,755.26 = 12,130.37 : x
  2. Step 2: Convert to fraction form
    21,561.81/29,755.26 = 12,130.37/x
  3. Step 3: Cross multiply
    21,561.81x = 29,755.26 × 12,130.37
  4. Step 4: Simplify right side
    21,561.81x = 360,942,276.05
  5. Step 5: Solve for x
    x = 360,942,276.05/21,561.81
  6. Step 6: Final answer
    x = 16,739.89

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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.