Home / 13,144.04-18,138.80-7,478.64

Finding the Fourth Proportional to 13,144.04, 18,138.80 and 7,478.64

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Solution

The fourth proportional to 13,144.04, 18,138.80 and 7,478.64 is: 10,320.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,144.04 : 18,138.80 = 7,478.64 : x
  2. Step 2: Convert to fraction form
    13,144.04/18,138.80 = 7,478.64/x
  3. Step 3: Cross multiply
    13,144.04x = 18,138.80 × 7,478.64
  4. Step 4: Simplify right side
    13,144.04x = 135,653,555.23
  5. Step 5: Solve for x
    x = 135,653,555.23/13,144.04
  6. Step 6: Final answer
    x = 10,320.54

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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.