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Finding the Fourth Proportional to 6,423, 9,634.50 and 1,559

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Solution

The fourth proportional to 6,423, 9,634.50 and 1,559 is: 2,338.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,423 : 9,634.50 = 1,559 : x
  2. Step 2: Convert to fraction form
    6,423/9,634.50 = 1,559/x
  3. Step 3: Cross multiply
    6,423x = 9,634.50 × 1,559
  4. Step 4: Simplify right side
    6,423x = 15,020,185.50
  5. Step 5: Solve for x
    x = 15,020,185.50/6,423
  6. Step 6: Final answer
    x = 2,338.50

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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.