Home / 20,816.28-31,209.81-7,666.96

Finding the Fourth Proportional to 20,816.28, 31,209.81 and 7,666.96

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Solution

The fourth proportional to 20,816.28, 31,209.81 and 7,666.96 is: 11,495.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.28 : 31,209.81 = 7,666.96 : x
  2. Step 2: Convert to fraction form
    20,816.28/31,209.81 = 7,666.96/x
  3. Step 3: Cross multiply
    20,816.28x = 31,209.81 × 7,666.96
  4. Step 4: Simplify right side
    20,816.28x = 239,284,364.88
  5. Step 5: Solve for x
    x = 239,284,364.88/20,816.28
  6. Step 6: Final answer
    x = 11,495.06

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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.