Home / 18,693.18-25,795.68-11,139.35

Finding the Fourth Proportional to 18,693.18, 25,795.68 and 11,139.35

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Solution

The fourth proportional to 18,693.18, 25,795.68 and 11,139.35 is: 15,371.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.18 : 25,795.68 = 11,139.35 : x
  2. Step 2: Convert to fraction form
    18,693.18/25,795.68 = 11,139.35/x
  3. Step 3: Cross multiply
    18,693.18x = 25,795.68 × 11,139.35
  4. Step 4: Simplify right side
    18,693.18x = 287,347,117.54
  5. Step 5: Solve for x
    x = 287,347,117.54/18,693.18
  6. Step 6: Final answer
    x = 15,371.76

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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.