Home / 21,561.99-29,755.53-12,130.55

Finding the Fourth Proportional to 21,561.99, 29,755.53 and 12,130.55

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Solution

The fourth proportional to 21,561.99, 29,755.53 and 12,130.55 is: 16,740.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,561.99 : 29,755.53 = 12,130.55 : x
  2. Step 2: Convert to fraction form
    21,561.99/29,755.53 = 12,130.55/x
  3. Step 3: Cross multiply
    21,561.99x = 29,755.53 × 12,130.55
  4. Step 4: Simplify right side
    21,561.99x = 360,950,944.44
  5. Step 5: Solve for x
    x = 360,950,944.44/21,561.99
  6. Step 6: Final answer
    x = 16,740.15

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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.