Home / 28,536.40-39,381-15,960.40

Finding the Fourth Proportional to 28,536.40, 39,381 and 15,960.40

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Solution

The fourth proportional to 28,536.40, 39,381 and 15,960.40 is: 22,025.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,536.40 : 39,381 = 15,960.40 : x
  2. Step 2: Convert to fraction form
    28,536.40/39,381 = 15,960.40/x
  3. Step 3: Cross multiply
    28,536.40x = 39,381 × 15,960.40
  4. Step 4: Simplify right side
    28,536.40x = 628,536,512.40
  5. Step 5: Solve for x
    x = 628,536,512.40/28,536.40
  6. Step 6: Final answer
    x = 22,025.78

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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.