Home / 13,389.75-18,470.16-8,351.55

Finding the Fourth Proportional to 13,389.75, 18,470.16 and 8,351.55

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Solution

The fourth proportional to 13,389.75, 18,470.16 and 8,351.55 is: 11,520.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.75 : 18,470.16 = 8,351.55 : x
  2. Step 2: Convert to fraction form
    13,389.75/18,470.16 = 8,351.55/x
  3. Step 3: Cross multiply
    13,389.75x = 18,470.16 × 8,351.55
  4. Step 4: Simplify right side
    13,389.75x = 154,254,464.75
  5. Step 5: Solve for x
    x = 154,254,464.75/13,389.75
  6. Step 6: Final answer
    x = 11,520.34

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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.