Home / 21,873.92-30,183.30-12,312.64

Finding the Fourth Proportional to 21,873.92, 30,183.30 and 12,312.64

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Solution

The fourth proportional to 21,873.92, 30,183.30 and 12,312.64 is: 16,989.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,873.92 : 30,183.30 = 12,312.64 : x
  2. Step 2: Convert to fraction form
    21,873.92/30,183.30 = 12,312.64/x
  3. Step 3: Cross multiply
    21,873.92x = 30,183.30 × 12,312.64
  4. Step 4: Simplify right side
    21,873.92x = 371,636,106.91
  5. Step 5: Solve for x
    x = 371,636,106.91/21,873.92
  6. Step 6: Final answer
    x = 16,989.92

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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.