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Finding the Fourth Proportional to 19,409.29, 29,113.95 and 8,308.80

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Solution

The fourth proportional to 19,409.29, 29,113.95 and 8,308.80 is: 12,463.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,409.29 : 29,113.95 = 8,308.80 : x
  2. Step 2: Convert to fraction form
    19,409.29/29,113.95 = 8,308.80/x
  3. Step 3: Cross multiply
    19,409.29x = 29,113.95 × 8,308.80
  4. Step 4: Simplify right side
    19,409.29x = 241,901,987.76
  5. Step 5: Solve for x
    x = 241,901,987.76/19,409.29
  6. Step 6: Final answer
    x = 12,463.21

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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.