Home / 20,234.80-27,920.64-11,280.34

Finding the Fourth Proportional to 20,234.80, 27,920.64 and 11,280.34

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Solution

The fourth proportional to 20,234.80, 27,920.64 and 11,280.34 is: 15,564.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,234.80 : 27,920.64 = 11,280.34 : x
  2. Step 2: Convert to fraction form
    20,234.80/27,920.64 = 11,280.34/x
  3. Step 3: Cross multiply
    20,234.80x = 27,920.64 × 11,280.34
  4. Step 4: Simplify right side
    20,234.80x = 314,954,312.22
  5. Step 5: Solve for x
    x = 314,954,312.22/20,234.80
  6. Step 6: Final answer
    x = 15,564.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.