Home / 20,996.32-31,513.92-10,615.36

Finding the Fourth Proportional to 20,996.32, 31,513.92 and 10,615.36

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Solution

The fourth proportional to 20,996.32, 31,513.92 and 10,615.36 is: 15,932.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.32 : 31,513.92 = 10,615.36 : x
  2. Step 2: Convert to fraction form
    20,996.32/31,513.92 = 10,615.36/x
  3. Step 3: Cross multiply
    20,996.32x = 31,513.92 × 10,615.36
  4. Step 4: Simplify right side
    20,996.32x = 334,531,605.81
  5. Step 5: Solve for x
    x = 334,531,605.81/20,996.32
  6. Step 6: Final answer
    x = 15,932.87

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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.