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Finding the Fourth Proportional to 12,281.69, 18,405.10 and 9,459.85

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Solution

The fourth proportional to 12,281.69, 18,405.10 and 9,459.85 is: 14,176.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,281.69 : 18,405.10 = 9,459.85 : x
  2. Step 2: Convert to fraction form
    12,281.69/18,405.10 = 9,459.85/x
  3. Step 3: Cross multiply
    12,281.69x = 18,405.10 × 9,459.85
  4. Step 4: Simplify right side
    12,281.69x = 174,109,485.24
  5. Step 5: Solve for x
    x = 174,109,485.24/12,281.69
  6. Step 6: Final answer
    x = 14,176.35

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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.