Home / 20,863.45-28,790.86-12,365.65

Finding the Fourth Proportional to 20,863.45, 28,790.86 and 12,365.65

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Solution

The fourth proportional to 20,863.45, 28,790.86 and 12,365.65 is: 17,064.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.45 : 28,790.86 = 12,365.65 : x
  2. Step 2: Convert to fraction form
    20,863.45/28,790.86 = 12,365.65/x
  3. Step 3: Cross multiply
    20,863.45x = 28,790.86 × 12,365.65
  4. Step 4: Simplify right side
    20,863.45x = 356,017,492.18
  5. Step 5: Solve for x
    x = 356,017,492.18/20,863.45
  6. Step 6: Final answer
    x = 17,064.18

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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.