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Finding the Fourth Proportional to 43,809.76, 65,761.40 and 18,862.16

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Solution

The fourth proportional to 43,809.76, 65,761.40 and 18,862.16 is: 28,313.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,809.76 : 65,761.40 = 18,862.16 : x
  2. Step 2: Convert to fraction form
    43,809.76/65,761.40 = 18,862.16/x
  3. Step 3: Cross multiply
    43,809.76x = 65,761.40 × 18,862.16
  4. Step 4: Simplify right side
    43,809.76x = 1,240,402,048.62
  5. Step 5: Solve for x
    x = 1,240,402,048.62/43,809.76
  6. Step 6: Final answer
    x = 28,313.37

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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.