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Finding the Fourth Proportional to 19,411.40, 29,110.95 and 8,315.15

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Solution

The fourth proportional to 19,411.40, 29,110.95 and 8,315.15 is: 12,470.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,411.40 : 29,110.95 = 8,315.15 : x
  2. Step 2: Convert to fraction form
    19,411.40/29,110.95 = 8,315.15/x
  3. Step 3: Cross multiply
    19,411.40x = 29,110.95 × 8,315.15
  4. Step 4: Simplify right side
    19,411.40x = 242,061,770.34
  5. Step 5: Solve for x
    x = 242,061,770.34/19,411.40
  6. Step 6: Final answer
    x = 12,470.09

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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.