Home / 20,873.18-28,810.43-12,910.77

Finding the Fourth Proportional to 20,873.18, 28,810.43 and 12,910.77

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Solution

The fourth proportional to 20,873.18, 28,810.43 and 12,910.77 is: 17,820.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,873.18 : 28,810.43 = 12,910.77 : x
  2. Step 2: Convert to fraction form
    20,873.18/28,810.43 = 12,910.77/x
  3. Step 3: Cross multiply
    20,873.18x = 28,810.43 × 12,910.77
  4. Step 4: Simplify right side
    20,873.18x = 371,964,770.78
  5. Step 5: Solve for x
    x = 371,964,770.78/20,873.18
  6. Step 6: Final answer
    x = 17,820.23

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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.