Home / 28,025.28-38,677.62-20,939.40

Finding the Fourth Proportional to 28,025.28, 38,677.62 and 20,939.40

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Solution

The fourth proportional to 28,025.28, 38,677.62 and 20,939.40 is: 28,898.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,025.28 : 38,677.62 = 20,939.40 : x
  2. Step 2: Convert to fraction form
    28,025.28/38,677.62 = 20,939.40/x
  3. Step 3: Cross multiply
    28,025.28x = 38,677.62 × 20,939.40
  4. Step 4: Simplify right side
    28,025.28x = 809,886,156.23
  5. Step 5: Solve for x
    x = 809,886,156.23/28,025.28
  6. Step 6: Final answer
    x = 28,898.41

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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.