Home / 13,321.32-18,390.09-8,287.17

Finding the Fourth Proportional to 13,321.32, 18,390.09 and 8,287.17

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Solution

The fourth proportional to 13,321.32, 18,390.09 and 8,287.17 is: 11,440.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.32 : 18,390.09 = 8,287.17 : x
  2. Step 2: Convert to fraction form
    13,321.32/18,390.09 = 8,287.17/x
  3. Step 3: Cross multiply
    13,321.32x = 18,390.09 × 8,287.17
  4. Step 4: Simplify right side
    13,321.32x = 152,401,802.15
  5. Step 5: Solve for x
    x = 152,401,802.15/13,321.32
  6. Step 6: Final answer
    x = 11,440.44

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1.5x scale

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.