Home / 28,288.20-42,432.30-7,228.20

Finding the Fourth Proportional to 28,288.20, 42,432.30 and 7,228.20

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Solution

The fourth proportional to 28,288.20, 42,432.30 and 7,228.20 is: 10,842.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,288.20 : 42,432.30 = 7,228.20 : x
  2. Step 2: Convert to fraction form
    28,288.20/42,432.30 = 7,228.20/x
  3. Step 3: Cross multiply
    28,288.20x = 42,432.30 × 7,228.20
  4. Step 4: Simplify right side
    28,288.20x = 306,709,150.86
  5. Step 5: Solve for x
    x = 306,709,150.86/28,288.20
  6. Step 6: Final answer
    x = 10,842.30

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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.