Home / 20,823.36-28,736.32-12,863.76

Finding the Fourth Proportional to 20,823.36, 28,736.32 and 12,863.76

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Solution

The fourth proportional to 20,823.36, 28,736.32 and 12,863.76 is: 17,752.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.36 : 28,736.32 = 12,863.76 : x
  2. Step 2: Convert to fraction form
    20,823.36/28,736.32 = 12,863.76/x
  3. Step 3: Cross multiply
    20,823.36x = 28,736.32 × 12,863.76
  4. Step 4: Simplify right side
    20,823.36x = 369,657,123.76
  5. Step 5: Solve for x
    x = 369,657,123.76/20,823.36
  6. Step 6: Final answer
    x = 17,752.04

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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.