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Finding the Fourth Proportional to 19,894.96, 29,860.36 and 12,977.84

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Solution

The fourth proportional to 19,894.96, 29,860.36 and 12,977.84 is: 19,478.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,894.96 : 29,860.36 = 12,977.84 : x
  2. Step 2: Convert to fraction form
    19,894.96/29,860.36 = 12,977.84/x
  3. Step 3: Cross multiply
    19,894.96x = 29,860.36 × 12,977.84
  4. Step 4: Simplify right side
    19,894.96x = 387,522,974.42
  5. Step 5: Solve for x
    x = 387,522,974.42/19,894.96
  6. Step 6: Final answer
    x = 19,478.45

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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.