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Finding the Fourth Proportional to 21,599.98, 29,808.89 and 12,039.88

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Solution

The fourth proportional to 21,599.98, 29,808.89 and 12,039.88 is: 16,615.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,599.98 : 29,808.89 = 12,039.88 : x
  2. Step 2: Convert to fraction form
    21,599.98/29,808.89 = 12,039.88/x
  3. Step 3: Cross multiply
    21,599.98x = 29,808.89 × 12,039.88
  4. Step 4: Simplify right side
    21,599.98x = 358,895,458.53
  5. Step 5: Solve for x
    x = 358,895,458.53/21,599.98
  6. Step 6: Final answer
    x = 16,615.55

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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.