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Finding the Fourth Proportional to 21,775.61, 32,636.07 and 11,779.94

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Solution

The fourth proportional to 21,775.61, 32,636.07 and 11,779.94 is: 17,655.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,775.61 : 32,636.07 = 11,779.94 : x
  2. Step 2: Convert to fraction form
    21,775.61/32,636.07 = 11,779.94/x
  3. Step 3: Cross multiply
    21,775.61x = 32,636.07 × 11,779.94
  4. Step 4: Simplify right side
    21,775.61x = 384,450,783.26
  5. Step 5: Solve for x
    x = 384,450,783.26/21,775.61
  6. Step 6: Final answer
    x = 17,655.11

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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.