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Finding the Fourth Proportional to 21,348.40, 32,022.60 and 20,916.40

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Solution

The fourth proportional to 21,348.40, 32,022.60 and 20,916.40 is: 31,374.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,348.40 : 32,022.60 = 20,916.40 : x
  2. Step 2: Convert to fraction form
    21,348.40/32,022.60 = 20,916.40/x
  3. Step 3: Cross multiply
    21,348.40x = 32,022.60 × 20,916.40
  4. Step 4: Simplify right side
    21,348.40x = 669,797,510.64
  5. Step 5: Solve for x
    x = 669,797,510.64/21,348.40
  6. Step 6: Final answer
    x = 31,374.60

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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.