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Finding the Fourth Proportional to 14,473, 21,709.50 and 5,239

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Solution

The fourth proportional to 14,473, 21,709.50 and 5,239 is: 7,858.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,473 : 21,709.50 = 5,239 : x
  2. Step 2: Convert to fraction form
    14,473/21,709.50 = 5,239/x
  3. Step 3: Cross multiply
    14,473x = 21,709.50 × 5,239
  4. Step 4: Simplify right side
    14,473x = 113,736,070.50
  5. Step 5: Solve for x
    x = 113,736,070.50/14,473
  6. Step 6: Final answer
    x = 7,858.50

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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.