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Finding the Fourth Proportional to 18,939.76, 26,137.05 and 10,442.22

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Solution

The fourth proportional to 18,939.76, 26,137.05 and 10,442.22 is: 14,410.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.76 : 26,137.05 = 10,442.22 : x
  2. Step 2: Convert to fraction form
    18,939.76/26,137.05 = 10,442.22/x
  3. Step 3: Cross multiply
    18,939.76x = 26,137.05 × 10,442.22
  4. Step 4: Simplify right side
    18,939.76x = 272,928,643.35
  5. Step 5: Solve for x
    x = 272,928,643.35/18,939.76
  6. Step 6: Final answer
    x = 14,410.36

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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.