Home / 20,729.36-31,083.96-7,572.80

Finding the Fourth Proportional to 20,729.36, 31,083.96 and 7,572.80

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Solution

The fourth proportional to 20,729.36, 31,083.96 and 7,572.80 is: 11,355.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.36 : 31,083.96 = 7,572.80 : x
  2. Step 2: Convert to fraction form
    20,729.36/31,083.96 = 7,572.80/x
  3. Step 3: Cross multiply
    20,729.36x = 31,083.96 × 7,572.80
  4. Step 4: Simplify right side
    20,729.36x = 235,392,612.29
  5. Step 5: Solve for x
    x = 235,392,612.29/20,729.36
  6. Step 6: Final answer
    x = 11,355.52

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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.