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Finding the Fourth Proportional to 28,353.60, 42,482.88 and 20,019.78

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Solution

The fourth proportional to 28,353.60, 42,482.88 and 20,019.78 is: 29,996.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,353.60 : 42,482.88 = 20,019.78 : x
  2. Step 2: Convert to fraction form
    28,353.60/42,482.88 = 20,019.78/x
  3. Step 3: Cross multiply
    28,353.60x = 42,482.88 × 20,019.78
  4. Step 4: Simplify right side
    28,353.60x = 850,497,911.37
  5. Step 5: Solve for x
    x = 850,497,911.37/28,353.60
  6. Step 6: Final answer
    x = 29,996.12

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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.