Home / 20,747.79-28,632.06-11,316.42

Finding the Fourth Proportional to 20,747.79, 28,632.06 and 11,316.42

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Solution

The fourth proportional to 20,747.79, 28,632.06 and 11,316.42 is: 15,616.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.79 : 28,632.06 = 11,316.42 : x
  2. Step 2: Convert to fraction form
    20,747.79/28,632.06 = 11,316.42/x
  3. Step 3: Cross multiply
    20,747.79x = 28,632.06 × 11,316.42
  4. Step 4: Simplify right side
    20,747.79x = 324,012,416.43
  5. Step 5: Solve for x
    x = 324,012,416.43/20,747.79
  6. Step 6: Final answer
    x = 15,616.72

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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.