Home / 21,179.36-31,706.64-15,657.32

Finding the Fourth Proportional to 21,179.36, 31,706.64 and 15,657.32

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Solution

The fourth proportional to 21,179.36, 31,706.64 and 15,657.32 is: 23,439.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.36 : 31,706.64 = 15,657.32 : x
  2. Step 2: Convert to fraction form
    21,179.36/31,706.64 = 15,657.32/x
  3. Step 3: Cross multiply
    21,179.36x = 31,706.64 × 15,657.32
  4. Step 4: Simplify right side
    21,179.36x = 496,441,008.60
  5. Step 5: Solve for x
    x = 496,441,008.60/21,179.36
  6. Step 6: Final answer
    x = 23,439.85

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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.