Home / 5,215.86-7,823.80-1,320.27

Finding the Fourth Proportional to 5,215.86, 7,823.80 and 1,320.27

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Solution

The fourth proportional to 5,215.86, 7,823.80 and 1,320.27 is: 1,980.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.86 : 7,823.80 = 1,320.27 : x
  2. Step 2: Convert to fraction form
    5,215.86/7,823.80 = 1,320.27/x
  3. Step 3: Cross multiply
    5,215.86x = 7,823.80 × 1,320.27
  4. Step 4: Simplify right side
    5,215.86x = 10,329,493.31
  5. Step 5: Solve for x
    x = 10,329,493.31/5,215.86
  6. Step 6: Final answer
    x = 1,980.40

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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.