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Finding the Fourth Proportional to 18,920.70, 26,111.36 and 10,537.20

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Solution

The fourth proportional to 18,920.70, 26,111.36 and 10,537.20 is: 14,541.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.70 : 26,111.36 = 10,537.20 : x
  2. Step 2: Convert to fraction form
    18,920.70/26,111.36 = 10,537.20/x
  3. Step 3: Cross multiply
    18,920.70x = 26,111.36 × 10,537.20
  4. Step 4: Simplify right side
    18,920.70x = 275,140,622.59
  5. Step 5: Solve for x
    x = 275,140,622.59/18,920.70
  6. Step 6: Final answer
    x = 14,541.78

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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.