Home / 20,615.72-28,449.80-11,184.28

Finding the Fourth Proportional to 20,615.72, 28,449.80 and 11,184.28

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Solution

The fourth proportional to 20,615.72, 28,449.80 and 11,184.28 is: 15,434.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.72 : 28,449.80 = 11,184.28 : x
  2. Step 2: Convert to fraction form
    20,615.72/28,449.80 = 11,184.28/x
  3. Step 3: Cross multiply
    20,615.72x = 28,449.80 × 11,184.28
  4. Step 4: Simplify right side
    20,615.72x = 318,190,444.04
  5. Step 5: Solve for x
    x = 318,190,444.04/20,615.72
  6. Step 6: Final answer
    x = 15,434.36

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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.