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Finding the Fourth Proportional to 18,783.72, 25,920.68 and 10,827.12

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Solution

The fourth proportional to 18,783.72, 25,920.68 and 10,827.12 is: 14,940.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.72 : 25,920.68 = 10,827.12 : x
  2. Step 2: Convert to fraction form
    18,783.72/25,920.68 = 10,827.12/x
  3. Step 3: Cross multiply
    18,783.72x = 25,920.68 × 10,827.12
  4. Step 4: Simplify right side
    18,783.72x = 280,646,312.84
  5. Step 5: Solve for x
    x = 280,646,312.84/18,783.72
  6. Step 6: Final answer
    x = 14,940.93

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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.