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Finding the Fourth Proportional to 21,374.55, 32,061.83 and 19,916.55

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Solution

The fourth proportional to 21,374.55, 32,061.83 and 19,916.55 is: 29,874.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,374.55 : 32,061.83 = 19,916.55 : x
  2. Step 2: Convert to fraction form
    21,374.55/32,061.83 = 19,916.55/x
  3. Step 3: Cross multiply
    21,374.55x = 32,061.83 × 19,916.55
  4. Step 4: Simplify right side
    21,374.55x = 638,560,940.70
  5. Step 5: Solve for x
    x = 638,560,940.70/21,374.55
  6. Step 6: Final answer
    x = 29,874.83

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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.