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Finding the Fourth Proportional to 18,305.76, 25,261.78 and 10,239.32

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Solution

The fourth proportional to 18,305.76, 25,261.78 and 10,239.32 is: 14,130.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,305.76 : 25,261.78 = 10,239.32 : x
  2. Step 2: Convert to fraction form
    18,305.76/25,261.78 = 10,239.32/x
  3. Step 3: Cross multiply
    18,305.76x = 25,261.78 × 10,239.32
  4. Step 4: Simplify right side
    18,305.76x = 258,663,486.75
  5. Step 5: Solve for x
    x = 258,663,486.75/18,305.76
  6. Step 6: Final answer
    x = 14,130.17

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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.