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Finding the Fourth Proportional to 20,085.60, 30,099.60 and 14,779.20

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Solution

The fourth proportional to 20,085.60, 30,099.60 and 14,779.20 is: 22,147.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,085.60 : 30,099.60 = 14,779.20 : x
  2. Step 2: Convert to fraction form
    20,085.60/30,099.60 = 14,779.20/x
  3. Step 3: Cross multiply
    20,085.60x = 30,099.60 × 14,779.20
  4. Step 4: Simplify right side
    20,085.60x = 444,848,008.32
  5. Step 5: Solve for x
    x = 444,848,008.32/20,085.60
  6. Step 6: Final answer
    x = 22,147.61

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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.