Home / 13,715.51-20,536.20-7,127.84

Finding the Fourth Proportional to 13,715.51, 20,536.20 and 7,127.84

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Solution

The fourth proportional to 13,715.51, 20,536.20 and 7,127.84 is: 10,672.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,715.51 : 20,536.20 = 7,127.84 : x
  2. Step 2: Convert to fraction form
    13,715.51/20,536.20 = 7,127.84/x
  3. Step 3: Cross multiply
    13,715.51x = 20,536.20 × 7,127.84
  4. Step 4: Simplify right side
    13,715.51x = 146,378,799.15
  5. Step 5: Solve for x
    x = 146,378,799.15/13,715.51
  6. Step 6: Final answer
    x = 10,672.51

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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.