Home / 20,981.46-28,953.55-12,028.43

Finding the Fourth Proportional to 20,981.46, 28,953.55 and 12,028.43

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Solution

The fourth proportional to 20,981.46, 28,953.55 and 12,028.43 is: 16,598.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.46 : 28,953.55 = 12,028.43 : x
  2. Step 2: Convert to fraction form
    20,981.46/28,953.55 = 12,028.43/x
  3. Step 3: Cross multiply
    20,981.46x = 28,953.55 × 12,028.43
  4. Step 4: Simplify right side
    20,981.46x = 348,265,836.85
  5. Step 5: Solve for x
    x = 348,265,836.85/20,981.46
  6. Step 6: Final answer
    x = 16,598.74

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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.