Home / 20,580.40-28,400.76-12,081.04

Finding the Fourth Proportional to 20,580.40, 28,400.76 and 12,081.04

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Solution

The fourth proportional to 20,580.40, 28,400.76 and 12,081.04 is: 16,671.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.40 : 28,400.76 = 12,081.04 : x
  2. Step 2: Convert to fraction form
    20,580.40/28,400.76 = 12,081.04/x
  3. Step 3: Cross multiply
    20,580.40x = 28,400.76 × 12,081.04
  4. Step 4: Simplify right side
    20,580.40x = 343,110,717.59
  5. Step 5: Solve for x
    x = 343,110,717.59/20,580.40
  6. Step 6: Final answer
    x = 16,671.72

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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.