Home / 18,948.85-26,160.11-13,138.45

Finding the Fourth Proportional to 18,948.85, 26,160.11 and 13,138.45

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Solution

The fourth proportional to 18,948.85, 26,160.11 and 13,138.45 is: 18,138.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,948.85 : 26,160.11 = 13,138.45 : x
  2. Step 2: Convert to fraction form
    18,948.85/26,160.11 = 13,138.45/x
  3. Step 3: Cross multiply
    18,948.85x = 26,160.11 × 13,138.45
  4. Step 4: Simplify right side
    18,948.85x = 343,703,231.54
  5. Step 5: Solve for x
    x = 343,703,231.54/18,948.85
  6. Step 6: Final answer
    x = 18,138.47

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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.