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Finding the Fourth Proportional to 6,281, 9,421.50 and 3,545

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Solution

The fourth proportional to 6,281, 9,421.50 and 3,545 is: 5,317.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,281 : 9,421.50 = 3,545 : x
  2. Step 2: Convert to fraction form
    6,281/9,421.50 = 3,545/x
  3. Step 3: Cross multiply
    6,281x = 9,421.50 × 3,545
  4. Step 4: Simplify right side
    6,281x = 33,399,217.50
  5. Step 5: Solve for x
    x = 33,399,217.50/6,281
  6. Step 6: Final answer
    x = 5,317.50

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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.