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Finding the Fourth Proportional to 19,381.76, 29,070.72 and 6,243.68

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Solution

The fourth proportional to 19,381.76, 29,070.72 and 6,243.68 is: 9,364.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,381.76 : 29,070.72 = 6,243.68 : x
  2. Step 2: Convert to fraction form
    19,381.76/29,070.72 = 6,243.68/x
  3. Step 3: Cross multiply
    19,381.76x = 29,070.72 × 6,243.68
  4. Step 4: Simplify right side
    19,381.76x = 181,508,273.05
  5. Step 5: Solve for x
    x = 181,508,273.05/19,381.76
  6. Step 6: Final answer
    x = 9,364.90

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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.