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Finding the Fourth Proportional to 43,503.20, 65,253.61 and 13,920.61

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Solution

The fourth proportional to 43,503.20, 65,253.61 and 13,920.61 is: 20,880.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,503.20 : 65,253.61 = 13,920.61 : x
  2. Step 2: Convert to fraction form
    43,503.20/65,253.61 = 13,920.61/x
  3. Step 3: Cross multiply
    43,503.20x = 65,253.61 × 13,920.61
  4. Step 4: Simplify right side
    43,503.20x = 908,370,055.90
  5. Step 5: Solve for x
    x = 908,370,055.90/43,503.20
  6. Step 6: Final answer
    x = 20,880.53

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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.