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Finding the Fourth Proportional to 28,579.20, 42,862.08 and 7,797.76

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Solution

The fourth proportional to 28,579.20, 42,862.08 and 7,797.76 is: 11,694.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,579.20 : 42,862.08 = 7,797.76 : x
  2. Step 2: Convert to fraction form
    28,579.20/42,862.08 = 7,797.76/x
  3. Step 3: Cross multiply
    28,579.20x = 42,862.08 × 7,797.76
  4. Step 4: Simplify right side
    28,579.20x = 334,228,212.94
  5. Step 5: Solve for x
    x = 334,228,212.94/28,579.20
  6. Step 6: Final answer
    x = 11,694.81

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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.