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Finding the Fourth Proportional to 18,305.70, 25,261.65 and 10,347.90

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Solution

The fourth proportional to 18,305.70, 25,261.65 and 10,347.90 is: 14,279.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,305.70 : 25,261.65 = 10,347.90 : x
  2. Step 2: Convert to fraction form
    18,305.70/25,261.65 = 10,347.90/x
  3. Step 3: Cross multiply
    18,305.70x = 25,261.65 × 10,347.90
  4. Step 4: Simplify right side
    18,305.70x = 261,405,028.04
  5. Step 5: Solve for x
    x = 261,405,028.04/18,305.70
  6. Step 6: Final answer
    x = 14,279.98

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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.