Home / 20,431.96-28,185.51-13,719.93

Finding the Fourth Proportional to 20,431.96, 28,185.51 and 13,719.93

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Solution

The fourth proportional to 20,431.96, 28,185.51 and 13,719.93 is: 18,926.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.96 : 28,185.51 = 13,719.93 : x
  2. Step 2: Convert to fraction form
    20,431.96/28,185.51 = 13,719.93/x
  3. Step 3: Cross multiply
    20,431.96x = 28,185.51 × 13,719.93
  4. Step 4: Simplify right side
    20,431.96x = 386,703,224.21
  5. Step 5: Solve for x
    x = 386,703,224.21/20,431.96
  6. Step 6: Final answer
    x = 18,926.39

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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.