Home / 20,672.18-28,527.75-11,240.78

Finding the Fourth Proportional to 20,672.18, 28,527.75 and 11,240.78

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Solution

The fourth proportional to 20,672.18, 28,527.75 and 11,240.78 is: 15,512.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,672.18 : 28,527.75 = 11,240.78 : x
  2. Step 2: Convert to fraction form
    20,672.18/28,527.75 = 11,240.78/x
  3. Step 3: Cross multiply
    20,672.18x = 28,527.75 × 11,240.78
  4. Step 4: Simplify right side
    20,672.18x = 320,674,161.65
  5. Step 5: Solve for x
    x = 320,674,161.65/20,672.18
  6. Step 6: Final answer
    x = 15,512.35

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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.