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Finding the Fourth Proportional to 19,661.88, 29,491.02 and 12,623.40

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Solution

The fourth proportional to 19,661.88, 29,491.02 and 12,623.40 is: 18,933.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,661.88 : 29,491.02 = 12,623.40 : x
  2. Step 2: Convert to fraction form
    19,661.88/29,491.02 = 12,623.40/x
  3. Step 3: Cross multiply
    19,661.88x = 29,491.02 × 12,623.40
  4. Step 4: Simplify right side
    19,661.88x = 372,276,941.87
  5. Step 5: Solve for x
    x = 372,276,941.87/19,661.88
  6. Step 6: Final answer
    x = 18,933.94

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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.