Home / 28,388.64-39,170.40-15,810.96

Finding the Fourth Proportional to 28,388.64, 39,170.40 and 15,810.96

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Solution

The fourth proportional to 28,388.64, 39,170.40 and 15,810.96 is: 21,815.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,388.64 : 39,170.40 = 15,810.96 : x
  2. Step 2: Convert to fraction form
    28,388.64/39,170.40 = 15,810.96/x
  3. Step 3: Cross multiply
    28,388.64x = 39,170.40 × 15,810.96
  4. Step 4: Simplify right side
    28,388.64x = 619,321,627.58
  5. Step 5: Solve for x
    x = 619,321,627.58/28,388.64
  6. Step 6: Final answer
    x = 21,815.83

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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.