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Finding the Fourth Proportional to 21,779.72, 32,668.86 and 9,467.72

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Solution

The fourth proportional to 21,779.72, 32,668.86 and 9,467.72 is: 14,201.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,779.72 : 32,668.86 = 9,467.72 : x
  2. Step 2: Convert to fraction form
    21,779.72/32,668.86 = 9,467.72/x
  3. Step 3: Cross multiply
    21,779.72x = 32,668.86 × 9,467.72
  4. Step 4: Simplify right side
    21,779.72x = 309,299,619.20
  5. Step 5: Solve for x
    x = 309,299,619.20/21,779.72
  6. Step 6: Final answer
    x = 14,201.27

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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.