Home / 28,689.88-43,018.27-11,139.21

Finding the Fourth Proportional to 28,689.88, 43,018.27 and 11,139.21

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Solution

The fourth proportional to 28,689.88, 43,018.27 and 11,139.21 is: 16,702.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,689.88 : 43,018.27 = 11,139.21 : x
  2. Step 2: Convert to fraction form
    28,689.88/43,018.27 = 11,139.21/x
  3. Step 3: Cross multiply
    28,689.88x = 43,018.27 × 11,139.21
  4. Step 4: Simplify right side
    28,689.88x = 479,189,543.37
  5. Step 5: Solve for x
    x = 479,189,543.37/28,689.88
  6. Step 6: Final answer
    x = 16,702.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.