Home / 20,615.77-28,449.78-11,184.33

Finding the Fourth Proportional to 20,615.77, 28,449.78 and 11,184.33

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Solution

The fourth proportional to 20,615.77, 28,449.78 and 11,184.33 is: 15,434.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.77 : 28,449.78 = 11,184.33 : x
  2. Step 2: Convert to fraction form
    20,615.77/28,449.78 = 11,184.33/x
  3. Step 3: Cross multiply
    20,615.77x = 28,449.78 × 11,184.33
  4. Step 4: Simplify right side
    20,615.77x = 318,191,695.57
  5. Step 5: Solve for x
    x = 318,191,695.57/20,615.77
  6. Step 6: Final answer
    x = 15,434.39

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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.