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Finding the Fourth Proportional to 43,487.70, 65,243.70 and 21,301.80

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Solution

The fourth proportional to 43,487.70, 65,243.70 and 21,301.80 is: 31,958.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,487.70 : 65,243.70 = 21,301.80 : x
  2. Step 2: Convert to fraction form
    43,487.70/65,243.70 = 21,301.80/x
  3. Step 3: Cross multiply
    43,487.70x = 65,243.70 × 21,301.80
  4. Step 4: Simplify right side
    43,487.70x = 1,389,808,248.66
  5. Step 5: Solve for x
    x = 1,389,808,248.66/43,487.70
  6. Step 6: Final answer
    x = 31,958.65

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1.5x scale

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.