Home / 3,909.75-5,864.63-1,312.76

Finding the Fourth Proportional to 3,909.75, 5,864.63 and 1,312.76

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Solution

The fourth proportional to 3,909.75, 5,864.63 and 1,312.76 is: 1,969.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.75 : 5,864.63 = 1,312.76 : x
  2. Step 2: Convert to fraction form
    3,909.75/5,864.63 = 1,312.76/x
  3. Step 3: Cross multiply
    3,909.75x = 5,864.63 × 1,312.76
  4. Step 4: Simplify right side
    3,909.75x = 7,698,815.79
  5. Step 5: Solve for x
    x = 7,698,815.79/3,909.75
  6. Step 6: Final answer
    x = 1,969.13

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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.