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Finding the Fourth Proportional to 21,787, 30,063.58 and 12,225.63

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Solution

The fourth proportional to 21,787, 30,063.58 and 12,225.63 is: 16,869.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787 : 30,063.58 = 12,225.63 : x
  2. Step 2: Convert to fraction form
    21,787/30,063.58 = 12,225.63/x
  3. Step 3: Cross multiply
    21,787x = 30,063.58 × 12,225.63
  4. Step 4: Simplify right side
    21,787x = 367,546,205.56
  5. Step 5: Solve for x
    x = 367,546,205.56/21,787
  6. Step 6: Final answer
    x = 16,869.98

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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.