Home / 13,121.76-18,105.84-7,533.12

Finding the Fourth Proportional to 13,121.76, 18,105.84 and 7,533.12

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Solution

The fourth proportional to 13,121.76, 18,105.84 and 7,533.12 is: 10,394.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.76 : 18,105.84 = 7,533.12 : x
  2. Step 2: Convert to fraction form
    13,121.76/18,105.84 = 7,533.12/x
  3. Step 3: Cross multiply
    13,121.76x = 18,105.84 × 7,533.12
  4. Step 4: Simplify right side
    13,121.76x = 136,393,465.42
  5. Step 5: Solve for x
    x = 136,393,465.42/13,121.76
  6. Step 6: Final answer
    x = 10,394.45

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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.