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Finding the Fourth Proportional to 19,169, 28,753.50 and 5,318

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Solution

The fourth proportional to 19,169, 28,753.50 and 5,318 is: 7,977

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,169 : 28,753.50 = 5,318 : x
  2. Step 2: Convert to fraction form
    19,169/28,753.50 = 5,318/x
  3. Step 3: Cross multiply
    19,169x = 28,753.50 × 5,318
  4. Step 4: Simplify right side
    19,169x = 152,911,113
  5. Step 5: Solve for x
    x = 152,911,113/19,169
  6. Step 6: Final answer
    x = 7,977

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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.