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Finding the Fourth Proportional to 15,764.94, 21,757.08 and 11,779.08

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Solution

The fourth proportional to 15,764.94, 21,757.08 and 11,779.08 is: 16,256.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,764.94 : 21,757.08 = 11,779.08 : x
  2. Step 2: Convert to fraction form
    15,764.94/21,757.08 = 11,779.08/x
  3. Step 3: Cross multiply
    15,764.94x = 21,757.08 × 11,779.08
  4. Step 4: Simplify right side
    15,764.94x = 256,278,385.89
  5. Step 5: Solve for x
    x = 256,278,385.89/15,764.94
  6. Step 6: Final answer
    x = 16,256.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.