Home / 20,485.23-28,250.96-13,409.07

Finding the Fourth Proportional to 20,485.23, 28,250.96 and 13,409.07

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Solution

The fourth proportional to 20,485.23, 28,250.96 and 13,409.07 is: 18,492.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.23 : 28,250.96 = 13,409.07 : x
  2. Step 2: Convert to fraction form
    20,485.23/28,250.96 = 13,409.07/x
  3. Step 3: Cross multiply
    20,485.23x = 28,250.96 × 13,409.07
  4. Step 4: Simplify right side
    20,485.23x = 378,819,033.16
  5. Step 5: Solve for x
    x = 378,819,033.16/20,485.23
  6. Step 6: Final answer
    x = 18,492.30

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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.