Home / 20,511.60-30,779.51-8,664.61

Finding the Fourth Proportional to 20,511.60, 30,779.51 and 8,664.61

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Solution

The fourth proportional to 20,511.60, 30,779.51 and 8,664.61 is: 13,002.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.60 : 30,779.51 = 8,664.61 : x
  2. Step 2: Convert to fraction form
    20,511.60/30,779.51 = 8,664.61/x
  3. Step 3: Cross multiply
    20,511.60x = 30,779.51 × 8,664.61
  4. Step 4: Simplify right side
    20,511.60x = 266,692,468.81
  5. Step 5: Solve for x
    x = 266,692,468.81/20,511.60
  6. Step 6: Final answer
    x = 13,002.03

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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.