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Finding the Fourth Proportional to 21,764.60, 32,645.53 and 12,992.91

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Solution

The fourth proportional to 21,764.60, 32,645.53 and 12,992.91 is: 19,488.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,764.60 : 32,645.53 = 12,992.91 : x
  2. Step 2: Convert to fraction form
    21,764.60/32,645.53 = 12,992.91/x
  3. Step 3: Cross multiply
    21,764.60x = 32,645.53 × 12,992.91
  4. Step 4: Simplify right side
    21,764.60x = 424,160,327.01
  5. Step 5: Solve for x
    x = 424,160,327.01/21,764.60
  6. Step 6: Final answer
    x = 19,488.54

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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.