Home / 10,621.80-15,932.76-5,431.32

Finding the Fourth Proportional to 10,621.80, 15,932.76 and 5,431.32

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Solution

The fourth proportional to 10,621.80, 15,932.76 and 5,431.32 is: 8,147.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,621.80 : 15,932.76 = 5,431.32 : x
  2. Step 2: Convert to fraction form
    10,621.80/15,932.76 = 5,431.32/x
  3. Step 3: Cross multiply
    10,621.80x = 15,932.76 × 5,431.32
  4. Step 4: Simplify right side
    10,621.80x = 86,535,918.04
  5. Step 5: Solve for x
    x = 86,535,918.04/10,621.80
  6. Step 6: Final answer
    x = 8,147.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.