Home / 20,615.50-28,449.12-11,184.40

Finding the Fourth Proportional to 20,615.50, 28,449.12 and 11,184.40

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Solution

The fourth proportional to 20,615.50, 28,449.12 and 11,184.40 is: 15,434.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.50 : 28,449.12 = 11,184.40 : x
  2. Step 2: Convert to fraction form
    20,615.50/28,449.12 = 11,184.40/x
  3. Step 3: Cross multiply
    20,615.50x = 28,449.12 × 11,184.40
  4. Step 4: Simplify right side
    20,615.50x = 318,186,337.73
  5. Step 5: Solve for x
    x = 318,186,337.73/20,615.50
  6. Step 6: Final answer
    x = 15,434.33

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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.