Home / 20,431.53-28,197.52-13,731.14

Finding the Fourth Proportional to 20,431.53, 28,197.52 and 13,731.14

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Solution

The fourth proportional to 20,431.53, 28,197.52 and 13,731.14 is: 18,950.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.53 : 28,197.52 = 13,731.14 : x
  2. Step 2: Convert to fraction form
    20,431.53/28,197.52 = 13,731.14/x
  3. Step 3: Cross multiply
    20,431.53x = 28,197.52 × 13,731.14
  4. Step 4: Simplify right side
    20,431.53x = 387,184,130.94
  5. Step 5: Solve for x
    x = 387,184,130.94/20,431.53
  6. Step 6: Final answer
    x = 18,950.32

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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.