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Finding the Fourth Proportional to 21,888.58, 32,769.58 and 12,855.34

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Solution

The fourth proportional to 21,888.58, 32,769.58 and 12,855.34 is: 19,245.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,888.58 : 32,769.58 = 12,855.34 : x
  2. Step 2: Convert to fraction form
    21,888.58/32,769.58 = 12,855.34/x
  3. Step 3: Cross multiply
    21,888.58x = 32,769.58 × 12,855.34
  4. Step 4: Simplify right side
    21,888.58x = 421,264,092.56
  5. Step 5: Solve for x
    x = 421,264,092.56/21,888.58
  6. Step 6: Final answer
    x = 19,245.84

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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.