Home / 20,618.40-28,453.47-11,186.96

Finding the Fourth Proportional to 20,618.40, 28,453.47 and 11,186.96

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Solution

The fourth proportional to 20,618.40, 28,453.47 and 11,186.96 is: 15,438.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.40 : 28,453.47 = 11,186.96 : x
  2. Step 2: Convert to fraction form
    20,618.40/28,453.47 = 11,186.96/x
  3. Step 3: Cross multiply
    20,618.40x = 28,453.47 × 11,186.96
  4. Step 4: Simplify right side
    20,618.40x = 318,307,688.48
  5. Step 5: Solve for x
    x = 318,307,688.48/20,618.40
  6. Step 6: Final answer
    x = 15,438.04

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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.