Home / 28,757.86-39,686.16-15,838.60

Finding the Fourth Proportional to 28,757.86, 39,686.16 and 15,838.60

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Solution

The fourth proportional to 28,757.86, 39,686.16 and 15,838.60 is: 21,857.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,757.86 : 39,686.16 = 15,838.60 : x
  2. Step 2: Convert to fraction form
    28,757.86/39,686.16 = 15,838.60/x
  3. Step 3: Cross multiply
    28,757.86x = 39,686.16 × 15,838.60
  4. Step 4: Simplify right side
    28,757.86x = 628,573,213.78
  5. Step 5: Solve for x
    x = 628,573,213.78/28,757.86
  6. Step 6: Final answer
    x = 21,857.44

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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.