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Finding the Fourth Proportional to 18,383.88, 25,368.48 and 10,426.20

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Solution

The fourth proportional to 18,383.88, 25,368.48 and 10,426.20 is: 14,387.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,383.88 : 25,368.48 = 10,426.20 : x
  2. Step 2: Convert to fraction form
    18,383.88/25,368.48 = 10,426.20/x
  3. Step 3: Cross multiply
    18,383.88x = 25,368.48 × 10,426.20
  4. Step 4: Simplify right side
    18,383.88x = 264,496,846.18
  5. Step 5: Solve for x
    x = 264,496,846.18/18,383.88
  6. Step 6: Final answer
    x = 14,387.43

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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.