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Finding the Fourth Proportional to 21,958.40, 32,910.60 and 14,938.40

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Solution

The fourth proportional to 21,958.40, 32,910.60 and 14,938.40 is: 22,389.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,958.40 : 32,910.60 = 14,938.40 : x
  2. Step 2: Convert to fraction form
    21,958.40/32,910.60 = 14,938.40/x
  3. Step 3: Cross multiply
    21,958.40x = 32,910.60 × 14,938.40
  4. Step 4: Simplify right side
    21,958.40x = 491,631,707.04
  5. Step 5: Solve for x
    x = 491,631,707.04/21,958.40
  6. Step 6: Final answer
    x = 22,389.23

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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.