Home / 10,390.88-15,581.79-5,709.48

Finding the Fourth Proportional to 10,390.88, 15,581.79 and 5,709.48

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Solution

The fourth proportional to 10,390.88, 15,581.79 and 5,709.48 is: 8,561.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,390.88 : 15,581.79 = 5,709.48 : x
  2. Step 2: Convert to fraction form
    10,390.88/15,581.79 = 5,709.48/x
  3. Step 3: Cross multiply
    10,390.88x = 15,581.79 × 5,709.48
  4. Step 4: Simplify right side
    10,390.88x = 88,963,918.37
  5. Step 5: Solve for x
    x = 88,963,918.37/10,390.88
  6. Step 6: Final answer
    x = 8,561.74

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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.