Home / 20,931.82-31,367.01-10,529.26

Finding the Fourth Proportional to 20,931.82, 31,367.01 and 10,529.26

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Solution

The fourth proportional to 20,931.82, 31,367.01 and 10,529.26 is: 15,778.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.82 : 31,367.01 = 10,529.26 : x
  2. Step 2: Convert to fraction form
    20,931.82/31,367.01 = 10,529.26/x
  3. Step 3: Cross multiply
    20,931.82x = 31,367.01 × 10,529.26
  4. Step 4: Simplify right side
    20,931.82x = 330,271,403.71
  5. Step 5: Solve for x
    x = 330,271,403.71/20,931.82
  6. Step 6: Final answer
    x = 15,778.44

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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.