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Finding the Fourth Proportional to 21,779.73, 32,662.44 and 6,985.13

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Solution

The fourth proportional to 21,779.73, 32,662.44 and 6,985.13 is: 10,475.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,779.73 : 32,662.44 = 6,985.13 : x
  2. Step 2: Convert to fraction form
    21,779.73/32,662.44 = 6,985.13/x
  3. Step 3: Cross multiply
    21,779.73x = 32,662.44 × 6,985.13
  4. Step 4: Simplify right side
    21,779.73x = 228,151,226.21
  5. Step 5: Solve for x
    x = 228,151,226.21/21,779.73
  6. Step 6: Final answer
    x = 10,475.39

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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.