Home / 20,982.76-28,956.32-12,030.80

Finding the Fourth Proportional to 20,982.76, 28,956.32 and 12,030.80

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Solution

The fourth proportional to 20,982.76, 28,956.32 and 12,030.80 is: 16,602.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.76 : 28,956.32 = 12,030.80 : x
  2. Step 2: Convert to fraction form
    20,982.76/28,956.32 = 12,030.80/x
  3. Step 3: Cross multiply
    20,982.76x = 28,956.32 × 12,030.80
  4. Step 4: Simplify right side
    20,982.76x = 348,367,694.66
  5. Step 5: Solve for x
    x = 348,367,694.66/20,982.76
  6. Step 6: Final answer
    x = 16,602.57

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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.