Home / 20,747.80-28,631.64-11,316.16

Finding the Fourth Proportional to 20,747.80, 28,631.64 and 11,316.16

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Solution

The fourth proportional to 20,747.80, 28,631.64 and 11,316.16 is: 15,616.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.80 : 28,631.64 = 11,316.16 : x
  2. Step 2: Convert to fraction form
    20,747.80/28,631.64 = 11,316.16/x
  3. Step 3: Cross multiply
    20,747.80x = 28,631.64 × 11,316.16
  4. Step 4: Simplify right side
    20,747.80x = 324,000,219.30
  5. Step 5: Solve for x
    x = 324,000,219.30/20,747.80
  6. Step 6: Final answer
    x = 15,616.12

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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.