Home / 20,646.28-30,811.19-18,431.92

Finding the Fourth Proportional to 20,646.28, 30,811.19 and 18,431.92

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Solution

The fourth proportional to 20,646.28, 30,811.19 and 18,431.92 is: 27,506.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,646.28 : 30,811.19 = 18,431.92 : x
  2. Step 2: Convert to fraction form
    20,646.28/30,811.19 = 18,431.92/x
  3. Step 3: Cross multiply
    20,646.28x = 30,811.19 × 18,431.92
  4. Step 4: Simplify right side
    20,646.28x = 567,909,389.18
  5. Step 5: Solve for x
    x = 567,909,389.18/20,646.28
  6. Step 6: Final answer
    x = 27,506.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.