Home / 5,731-7,911.66-5,385.40

Finding the Fourth Proportional to 5,731, 7,911.66 and 5,385.40

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Solution

The fourth proportional to 5,731, 7,911.66 and 5,385.40 is: 7,434.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,731 : 7,911.66 = 5,385.40 : x
  2. Step 2: Convert to fraction form
    5,731/7,911.66 = 5,385.40/x
  3. Step 3: Cross multiply
    5,731x = 7,911.66 × 5,385.40
  4. Step 4: Simplify right side
    5,731x = 42,607,453.76
  5. Step 5: Solve for x
    x = 42,607,453.76/5,731
  6. Step 6: Final answer
    x = 7,434.56

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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.