Home / 28,108.80-38,763.77-18,040.40

Finding the Fourth Proportional to 28,108.80, 38,763.77 and 18,040.40

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Solution

The fourth proportional to 28,108.80, 38,763.77 and 18,040.40 is: 24,878.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,108.80 : 38,763.77 = 18,040.40 : x
  2. Step 2: Convert to fraction form
    28,108.80/38,763.77 = 18,040.40/x
  3. Step 3: Cross multiply
    28,108.80x = 38,763.77 × 18,040.40
  4. Step 4: Simplify right side
    28,108.80x = 699,313,916.31
  5. Step 5: Solve for x
    x = 699,313,916.31/28,108.80
  6. Step 6: Final answer
    x = 24,878.83

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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.