Home / 28,396.59-39,188.99-15,649.72

Finding the Fourth Proportional to 28,396.59, 39,188.99 and 15,649.72

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Solution

The fourth proportional to 28,396.59, 39,188.99 and 15,649.72 is: 21,597.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,396.59 : 39,188.99 = 15,649.72 : x
  2. Step 2: Convert to fraction form
    28,396.59/39,188.99 = 15,649.72/x
  3. Step 3: Cross multiply
    28,396.59x = 39,188.99 × 15,649.72
  4. Step 4: Simplify right side
    28,396.59x = 613,296,720.58
  5. Step 5: Solve for x
    x = 613,296,720.58/28,396.59
  6. Step 6: Final answer
    x = 21,597.55

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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.