Home / 20,328.71-30,493.60-7,178.09

Finding the Fourth Proportional to 20,328.71, 30,493.60 and 7,178.09

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Solution

The fourth proportional to 20,328.71, 30,493.60 and 7,178.09 is: 10,767.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,328.71 : 30,493.60 = 7,178.09 : x
  2. Step 2: Convert to fraction form
    20,328.71/30,493.60 = 7,178.09/x
  3. Step 3: Cross multiply
    20,328.71x = 30,493.60 × 7,178.09
  4. Step 4: Simplify right side
    20,328.71x = 218,885,634.81
  5. Step 5: Solve for x
    x = 218,885,634.81/20,328.71
  6. Step 6: Final answer
    x = 10,767.32

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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.