Home / 8,911.86-13,363.29-5,215.20

Finding the Fourth Proportional to 8,911.86, 13,363.29 and 5,215.20

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Solution

The fourth proportional to 8,911.86, 13,363.29 and 5,215.20 is: 7,820.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,911.86 : 13,363.29 = 5,215.20 : x
  2. Step 2: Convert to fraction form
    8,911.86/13,363.29 = 5,215.20/x
  3. Step 3: Cross multiply
    8,911.86x = 13,363.29 × 5,215.20
  4. Step 4: Simplify right side
    8,911.86x = 69,692,230.01
  5. Step 5: Solve for x
    x = 69,692,230.01/8,911.86
  6. Step 6: Final answer
    x = 7,820.17

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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.