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Finding the Fourth Proportional to 18,913.50, 26,100.81 and 10,530.18

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Solution

The fourth proportional to 18,913.50, 26,100.81 and 10,530.18 is: 14,531.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,913.50 : 26,100.81 = 10,530.18 : x
  2. Step 2: Convert to fraction form
    18,913.50/26,100.81 = 10,530.18/x
  3. Step 3: Cross multiply
    18,913.50x = 26,100.81 × 10,530.18
  4. Step 4: Simplify right side
    18,913.50x = 274,846,227.45
  5. Step 5: Solve for x
    x = 274,846,227.45/18,913.50
  6. Step 6: Final answer
    x = 14,531.75

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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.