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Finding the Fourth Proportional to 13,245.60, 18,278.19 and 7,276.89

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Solution

The fourth proportional to 13,245.60, 18,278.19 and 7,276.89 is: 10,041.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,245.60 : 18,278.19 = 7,276.89 : x
  2. Step 2: Convert to fraction form
    13,245.60/18,278.19 = 7,276.89/x
  3. Step 3: Cross multiply
    13,245.60x = 18,278.19 × 7,276.89
  4. Step 4: Simplify right side
    13,245.60x = 133,008,378.03
  5. Step 5: Solve for x
    x = 133,008,378.03/13,245.60
  6. Step 6: Final answer
    x = 10,041.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.