Home / 13,536.05-18,678.60-7,869.69

Finding the Fourth Proportional to 13,536.05, 18,678.60 and 7,869.69

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Solution

The fourth proportional to 13,536.05, 18,678.60 and 7,869.69 is: 10,859.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,536.05 : 18,678.60 = 7,869.69 : x
  2. Step 2: Convert to fraction form
    13,536.05/18,678.60 = 7,869.69/x
  3. Step 3: Cross multiply
    13,536.05x = 18,678.60 × 7,869.69
  4. Step 4: Simplify right side
    13,536.05x = 146,994,791.63
  5. Step 5: Solve for x
    x = 146,994,791.63/13,536.05
  6. Step 6: Final answer
    x = 10,859.51

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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.