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Finding the Fourth Proportional to 43,341.60, 65,024.82 and 21,155.16

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Solution

The fourth proportional to 43,341.60, 65,024.82 and 21,155.16 is: 31,738.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,341.60 : 65,024.82 = 21,155.16 : x
  2. Step 2: Convert to fraction form
    43,341.60/65,024.82 = 21,155.16/x
  3. Step 3: Cross multiply
    43,341.60x = 65,024.82 × 21,155.16
  4. Step 4: Simplify right side
    43,341.60x = 1,375,610,471.07
  5. Step 5: Solve for x
    x = 1,375,610,471.07/43,341.60
  6. Step 6: Final answer
    x = 31,738.80

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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.