Home / 20,981.68-28,953.85-12,022.95

Finding the Fourth Proportional to 20,981.68, 28,953.85 and 12,022.95

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Solution

The fourth proportional to 20,981.68, 28,953.85 and 12,022.95 is: 16,591.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.68 : 28,953.85 = 12,022.95 : x
  2. Step 2: Convert to fraction form
    20,981.68/28,953.85 = 12,022.95/x
  3. Step 3: Cross multiply
    20,981.68x = 28,953.85 × 12,022.95
  4. Step 4: Simplify right side
    20,981.68x = 348,110,690.86
  5. Step 5: Solve for x
    x = 348,110,690.86/20,981.68
  6. Step 6: Final answer
    x = 16,591.17

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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.