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Finding the Fourth Proportional to 18,861.68, 26,029.68 and 10,903.20

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Solution

The fourth proportional to 18,861.68, 26,029.68 and 10,903.20 is: 15,046.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,861.68 : 26,029.68 = 10,903.20 : x
  2. Step 2: Convert to fraction form
    18,861.68/26,029.68 = 10,903.20/x
  3. Step 3: Cross multiply
    18,861.68x = 26,029.68 × 10,903.20
  4. Step 4: Simplify right side
    18,861.68x = 283,806,806.98
  5. Step 5: Solve for x
    x = 283,806,806.98/18,861.68
  6. Step 6: Final answer
    x = 15,046.74

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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.