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Finding the Fourth Proportional to 28,579.84, 42,870.97 and 8,858.77

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Solution

The fourth proportional to 28,579.84, 42,870.97 and 8,858.77 is: 13,288.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,579.84 : 42,870.97 = 8,858.77 : x
  2. Step 2: Convert to fraction form
    28,579.84/42,870.97 = 8,858.77/x
  3. Step 3: Cross multiply
    28,579.84x = 42,870.97 × 8,858.77
  4. Step 4: Simplify right side
    28,579.84x = 379,783,966.80
  5. Step 5: Solve for x
    x = 379,783,966.80/28,579.84
  6. Step 6: Final answer
    x = 13,288.53

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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.