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Finding the Fourth Proportional to 21,474.99, 32,172.39 and 19,158.39

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Solution

The fourth proportional to 21,474.99, 32,172.39 and 19,158.39 is: 28,701.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,474.99 : 32,172.39 = 19,158.39 : x
  2. Step 2: Convert to fraction form
    21,474.99/32,172.39 = 19,158.39/x
  3. Step 3: Cross multiply
    21,474.99x = 32,172.39 × 19,158.39
  4. Step 4: Simplify right side
    21,474.99x = 616,371,194.85
  5. Step 5: Solve for x
    x = 616,371,194.85/21,474.99
  6. Step 6: Final answer
    x = 28,701.82

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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.