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Finding the Fourth Proportional to 43,302.60, 64,955.72 and 13,721.60

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Solution

The fourth proportional to 43,302.60, 64,955.72 and 13,721.60 is: 20,582.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,302.60 : 64,955.72 = 13,721.60 : x
  2. Step 2: Convert to fraction form
    43,302.60/64,955.72 = 13,721.60/x
  3. Step 3: Cross multiply
    43,302.60x = 64,955.72 × 13,721.60
  4. Step 4: Simplify right side
    43,302.60x = 891,296,604.25
  5. Step 5: Solve for x
    x = 891,296,604.25/43,302.60
  6. Step 6: Final answer
    x = 20,582.98

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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.