Home / 20,794.32-28,688.02-12,822.70

Finding the Fourth Proportional to 20,794.32, 28,688.02 and 12,822.70

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Solution

The fourth proportional to 20,794.32, 28,688.02 and 12,822.70 is: 17,690.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,794.32 : 28,688.02 = 12,822.70 : x
  2. Step 2: Convert to fraction form
    20,794.32/28,688.02 = 12,822.70/x
  3. Step 3: Cross multiply
    20,794.32x = 28,688.02 × 12,822.70
  4. Step 4: Simplify right side
    20,794.32x = 367,857,874.05
  5. Step 5: Solve for x
    x = 367,857,874.05/20,794.32
  6. Step 6: Final answer
    x = 17,690.31

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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.