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Finding the Fourth Proportional to 19,885.95, 29,806.79 and 8,189.01

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Solution

The fourth proportional to 19,885.95, 29,806.79 and 8,189.01 is: 12,274.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,885.95 : 29,806.79 = 8,189.01 : x
  2. Step 2: Convert to fraction form
    19,885.95/29,806.79 = 8,189.01/x
  3. Step 3: Cross multiply
    19,885.95x = 29,806.79 × 8,189.01
  4. Step 4: Simplify right side
    19,885.95x = 244,088,060.43
  5. Step 5: Solve for x
    x = 244,088,060.43/19,885.95
  6. Step 6: Final answer
    x = 12,274.40

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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.