Home / 28,015.20-42,022.80-10,481.40

Finding the Fourth Proportional to 28,015.20, 42,022.80 and 10,481.40

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Solution

The fourth proportional to 28,015.20, 42,022.80 and 10,481.40 is: 15,722.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,015.20 : 42,022.80 = 10,481.40 : x
  2. Step 2: Convert to fraction form
    28,015.20/42,022.80 = 10,481.40/x
  3. Step 3: Cross multiply
    28,015.20x = 42,022.80 × 10,481.40
  4. Step 4: Simplify right side
    28,015.20x = 440,457,775.92
  5. Step 5: Solve for x
    x = 440,457,775.92/28,015.20
  6. Step 6: Final answer
    x = 15,722.10

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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.