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Finding the Fourth Proportional to 18,903.70, 26,087.97 and 10,520.74

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Solution

The fourth proportional to 18,903.70, 26,087.97 and 10,520.74 is: 14,519.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.70 : 26,087.97 = 10,520.74 : x
  2. Step 2: Convert to fraction form
    18,903.70/26,087.97 = 10,520.74/x
  3. Step 3: Cross multiply
    18,903.70x = 26,087.97 × 10,520.74
  4. Step 4: Simplify right side
    18,903.70x = 274,464,749.50
  5. Step 5: Solve for x
    x = 274,464,749.50/18,903.70
  6. Step 6: Final answer
    x = 14,519.10

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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.