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Finding the Fourth Proportional to 19,929.60, 29,894.40 and 8,243.10

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Solution

The fourth proportional to 19,929.60, 29,894.40 and 8,243.10 is: 12,364.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,929.60 : 29,894.40 = 8,243.10 : x
  2. Step 2: Convert to fraction form
    19,929.60/29,894.40 = 8,243.10/x
  3. Step 3: Cross multiply
    19,929.60x = 29,894.40 × 8,243.10
  4. Step 4: Simplify right side
    19,929.60x = 246,422,528.64
  5. Step 5: Solve for x
    x = 246,422,528.64/19,929.60
  6. Step 6: Final answer
    x = 12,364.65

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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.