Home / 13,439.10-18,546.43-7,389.80

Finding the Fourth Proportional to 13,439.10, 18,546.43 and 7,389.80

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Solution

The fourth proportional to 13,439.10, 18,546.43 and 7,389.80 is: 10,198.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,439.10 : 18,546.43 = 7,389.80 : x
  2. Step 2: Convert to fraction form
    13,439.10/18,546.43 = 7,389.80/x
  3. Step 3: Cross multiply
    13,439.10x = 18,546.43 × 7,389.80
  4. Step 4: Simplify right side
    13,439.10x = 137,054,445.71
  5. Step 5: Solve for x
    x = 137,054,445.71/13,439.10
  6. Step 6: Final answer
    x = 10,198.19

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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.