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Finding the Fourth Proportional to 18,992.82, 28,459.80 and 14,307.78

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Solution

The fourth proportional to 18,992.82, 28,459.80 and 14,307.78 is: 21,439.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,992.82 : 28,459.80 = 14,307.78 : x
  2. Step 2: Convert to fraction form
    18,992.82/28,459.80 = 14,307.78/x
  3. Step 3: Cross multiply
    18,992.82x = 28,459.80 × 14,307.78
  4. Step 4: Simplify right side
    18,992.82x = 407,196,557.24
  5. Step 5: Solve for x
    x = 407,196,557.24/18,992.82
  6. Step 6: Final answer
    x = 21,439.50

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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.