Home / 20,372.36-28,109.58-13,309.16

Finding the Fourth Proportional to 20,372.36, 28,109.58 and 13,309.16

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Solution

The fourth proportional to 20,372.36, 28,109.58 and 13,309.16 is: 18,363.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,372.36 : 28,109.58 = 13,309.16 : x
  2. Step 2: Convert to fraction form
    20,372.36/28,109.58 = 13,309.16/x
  3. Step 3: Cross multiply
    20,372.36x = 28,109.58 × 13,309.16
  4. Step 4: Simplify right side
    20,372.36x = 374,114,897.75
  5. Step 5: Solve for x
    x = 374,114,897.75/20,372.36
  6. Step 6: Final answer
    x = 18,363.85

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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.