Home / 28,689.30-39,568.77-21,131.46

Finding the Fourth Proportional to 28,689.30, 39,568.77 and 21,131.46

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Solution

The fourth proportional to 28,689.30, 39,568.77 and 21,131.46 is: 29,144.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,689.30 : 39,568.77 = 21,131.46 : x
  2. Step 2: Convert to fraction form
    28,689.30/39,568.77 = 21,131.46/x
  3. Step 3: Cross multiply
    28,689.30x = 39,568.77 × 21,131.46
  4. Step 4: Simplify right side
    28,689.30x = 836,145,880.50
  5. Step 5: Solve for x
    x = 836,145,880.50/28,689.30
  6. Step 6: Final answer
    x = 29,144.87

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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.