Home / 28,689.13-39,579.90-21,153.34

Finding the Fourth Proportional to 28,689.13, 39,579.90 and 21,153.34

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Solution

The fourth proportional to 28,689.13, 39,579.90 and 21,153.34 is: 29,183.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,689.13 : 39,579.90 = 21,153.34 : x
  2. Step 2: Convert to fraction form
    28,689.13/39,579.90 = 21,153.34/x
  3. Step 3: Cross multiply
    28,689.13x = 39,579.90 × 21,153.34
  4. Step 4: Simplify right side
    28,689.13x = 837,246,883.97
  5. Step 5: Solve for x
    x = 837,246,883.97/28,689.13
  6. Step 6: Final answer
    x = 29,183.42

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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.