Home / 13,389.87-18,477.74-8,084.72

Finding the Fourth Proportional to 13,389.87, 18,477.74 and 8,084.72

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Solution

The fourth proportional to 13,389.87, 18,477.74 and 8,084.72 is: 11,156.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.87 : 18,477.74 = 8,084.72 : x
  2. Step 2: Convert to fraction form
    13,389.87/18,477.74 = 8,084.72/x
  3. Step 3: Cross multiply
    13,389.87x = 18,477.74 × 8,084.72
  4. Step 4: Simplify right side
    13,389.87x = 149,387,221.32
  5. Step 5: Solve for x
    x = 149,387,221.32/13,389.87
  6. Step 6: Final answer
    x = 11,156.73

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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.