Home / 20,385.36-28,127.52-13,322.16

Finding the Fourth Proportional to 20,385.36, 28,127.52 and 13,322.16

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Solution

The fourth proportional to 20,385.36, 28,127.52 and 13,322.16 is: 18,381.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.36 : 28,127.52 = 13,322.16 : x
  2. Step 2: Convert to fraction form
    20,385.36/28,127.52 = 13,322.16/x
  3. Step 3: Cross multiply
    20,385.36x = 28,127.52 × 13,322.16
  4. Step 4: Simplify right side
    20,385.36x = 374,719,321.84
  5. Step 5: Solve for x
    x = 374,719,321.84/20,385.36
  6. Step 6: Final answer
    x = 18,381.79

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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.