Home / 20,561.59-28,380.32-13,409.35

Finding the Fourth Proportional to 20,561.59, 28,380.32 and 13,409.35

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Solution

The fourth proportional to 20,561.59, 28,380.32 and 13,409.35 is: 18,508.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.59 : 28,380.32 = 13,409.35 : x
  2. Step 2: Convert to fraction form
    20,561.59/28,380.32 = 13,409.35/x
  3. Step 3: Cross multiply
    20,561.59x = 28,380.32 × 13,409.35
  4. Step 4: Simplify right side
    20,561.59x = 380,561,643.99
  5. Step 5: Solve for x
    x = 380,561,643.99/20,561.59
  6. Step 6: Final answer
    x = 18,508.38

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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.