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Finding the Fourth Proportional to 43,360, 65,040 and 18,753.28

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Solution

The fourth proportional to 43,360, 65,040 and 18,753.28 is: 28,129.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,360 : 65,040 = 18,753.28 : x
  2. Step 2: Convert to fraction form
    43,360/65,040 = 18,753.28/x
  3. Step 3: Cross multiply
    43,360x = 65,040 × 18,753.28
  4. Step 4: Simplify right side
    43,360x = 1,219,713,331.20
  5. Step 5: Solve for x
    x = 1,219,713,331.20/43,360
  6. Step 6: Final answer
    x = 28,129.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.