Home / 21,180.36-31,708.14-15,658.32

Finding the Fourth Proportional to 21,180.36, 31,708.14 and 15,658.32

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Solution

The fourth proportional to 21,180.36, 31,708.14 and 15,658.32 is: 23,441.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.36 : 31,708.14 = 15,658.32 : x
  2. Step 2: Convert to fraction form
    21,180.36/31,708.14 = 15,658.32/x
  3. Step 3: Cross multiply
    21,180.36x = 31,708.14 × 15,658.32
  4. Step 4: Simplify right side
    21,180.36x = 496,496,202.72
  5. Step 5: Solve for x
    x = 496,496,202.72/21,180.36
  6. Step 6: Final answer
    x = 23,441.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.