Home / 20,674.18-28,530.51-11,242.78

Finding the Fourth Proportional to 20,674.18, 28,530.51 and 11,242.78

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Solution

The fourth proportional to 20,674.18, 28,530.51 and 11,242.78 is: 15,515.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,674.18 : 28,530.51 = 11,242.78 : x
  2. Step 2: Convert to fraction form
    20,674.18/28,530.51 = 11,242.78/x
  3. Step 3: Cross multiply
    20,674.18x = 28,530.51 × 11,242.78
  4. Step 4: Simplify right side
    20,674.18x = 320,762,247.22
  5. Step 5: Solve for x
    x = 320,762,247.22/20,674.18
  6. Step 6: Final answer
    x = 15,515.11

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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.