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Finding the Fourth Proportional to 15,779.58, 21,777.33 and 11,793.79

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Solution

The fourth proportional to 15,779.58, 21,777.33 and 11,793.79 is: 16,276.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.58 : 21,777.33 = 11,793.79 : x
  2. Step 2: Convert to fraction form
    15,779.58/21,777.33 = 11,793.79/x
  3. Step 3: Cross multiply
    15,779.58x = 21,777.33 × 11,793.79
  4. Step 4: Simplify right side
    15,779.58x = 256,837,256.78
  5. Step 5: Solve for x
    x = 256,837,256.78/15,779.58
  6. Step 6: Final answer
    x = 16,276.56

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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.