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Finding the Fourth Proportional to 43,809.40, 65,706.92 and 12,221.60

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Solution

The fourth proportional to 43,809.40, 65,706.92 and 12,221.60 is: 18,330.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,809.40 : 65,706.92 = 12,221.60 : x
  2. Step 2: Convert to fraction form
    43,809.40/65,706.92 = 12,221.60/x
  3. Step 3: Cross multiply
    43,809.40x = 65,706.92 × 12,221.60
  4. Step 4: Simplify right side
    43,809.40x = 803,043,693.47
  5. Step 5: Solve for x
    x = 803,043,693.47/43,809.40
  6. Step 6: Final answer
    x = 18,330.40

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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.