Home / 20,440-28,207.20-11,487.34

Finding the Fourth Proportional to 20,440, 28,207.20 and 11,487.34

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Solution

The fourth proportional to 20,440, 28,207.20 and 11,487.34 is: 15,852.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440 : 28,207.20 = 11,487.34 : x
  2. Step 2: Convert to fraction form
    20,440/28,207.20 = 11,487.34/x
  3. Step 3: Cross multiply
    20,440x = 28,207.20 × 11,487.34
  4. Step 4: Simplify right side
    20,440x = 324,025,696.85
  5. Step 5: Solve for x
    x = 324,025,696.85/20,440
  6. Step 6: Final answer
    x = 15,852.53

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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.