Home / 18,939.28-28,406.18-5,788.12

Finding the Fourth Proportional to 18,939.28, 28,406.18 and 5,788.12

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Solution

The fourth proportional to 18,939.28, 28,406.18 and 5,788.12 is: 8,681.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.28 : 28,406.18 = 5,788.12 : x
  2. Step 2: Convert to fraction form
    18,939.28/28,406.18 = 5,788.12/x
  3. Step 3: Cross multiply
    18,939.28x = 28,406.18 × 5,788.12
  4. Step 4: Simplify right side
    18,939.28x = 164,418,236.55
  5. Step 5: Solve for x
    x = 164,418,236.55/18,939.28
  6. Step 6: Final answer
    x = 8,681.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.