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Finding the Fourth Proportional to 18,299, 25,242.90 and 12,320.48

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Solution

The fourth proportional to 18,299, 25,242.90 and 12,320.48 is: 16,995.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,299 : 25,242.90 = 12,320.48 : x
  2. Step 2: Convert to fraction form
    18,299/25,242.90 = 12,320.48/x
  3. Step 3: Cross multiply
    18,299x = 25,242.90 × 12,320.48
  4. Step 4: Simplify right side
    18,299x = 311,004,644.59
  5. Step 5: Solve for x
    x = 311,004,644.59/18,299
  6. Step 6: Final answer
    x = 16,995.72

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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.