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Finding the Fourth Proportional to 28,620.56, 42,936.12 and 8,897.84

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Solution

The fourth proportional to 28,620.56, 42,936.12 and 8,897.84 is: 13,348.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,620.56 : 42,936.12 = 8,897.84 : x
  2. Step 2: Convert to fraction form
    28,620.56/42,936.12 = 8,897.84/x
  3. Step 3: Cross multiply
    28,620.56x = 42,936.12 × 8,897.84
  4. Step 4: Simplify right side
    28,620.56x = 382,038,725.98
  5. Step 5: Solve for x
    x = 382,038,725.98/28,620.56
  6. Step 6: Final answer
    x = 13,348.40

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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.