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Finding the Fourth Proportional to 19,915.95, 29,878.01 and 16,651.86

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Solution

The fourth proportional to 19,915.95, 29,878.01 and 16,651.86 is: 24,981.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,915.95 : 29,878.01 = 16,651.86 : x
  2. Step 2: Convert to fraction form
    19,915.95/29,878.01 = 16,651.86/x
  3. Step 3: Cross multiply
    19,915.95x = 29,878.01 × 16,651.86
  4. Step 4: Simplify right side
    19,915.95x = 497,524,356.34
  5. Step 5: Solve for x
    x = 497,524,356.34/19,915.95
  6. Step 6: Final answer
    x = 24,981.20

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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.