Home / 13,913.82-20,870.73-5,138.51

Finding the Fourth Proportional to 13,913.82, 20,870.73 and 5,138.51

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Solution

The fourth proportional to 13,913.82, 20,870.73 and 5,138.51 is: 7,707.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,913.82 : 20,870.73 = 5,138.51 : x
  2. Step 2: Convert to fraction form
    13,913.82/20,870.73 = 5,138.51/x
  3. Step 3: Cross multiply
    13,913.82x = 20,870.73 × 5,138.51
  4. Step 4: Simplify right side
    13,913.82x = 107,244,350.46
  5. Step 5: Solve for x
    x = 107,244,350.46/13,913.82
  6. Step 6: Final answer
    x = 7,707.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.