Home / 15,605.76-21,536.37-9,321.78

Finding the Fourth Proportional to 15,605.76, 21,536.37 and 9,321.78

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Solution

The fourth proportional to 15,605.76, 21,536.37 and 9,321.78 is: 12,864.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,605.76 : 21,536.37 = 9,321.78 : x
  2. Step 2: Convert to fraction form
    15,605.76/21,536.37 = 9,321.78/x
  3. Step 3: Cross multiply
    15,605.76x = 21,536.37 × 9,321.78
  4. Step 4: Simplify right side
    15,605.76x = 200,757,303.14
  5. Step 5: Solve for x
    x = 200,757,303.14/15,605.76
  6. Step 6: Final answer
    x = 12,864.31

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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.