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Finding the Fourth Proportional to 19,378.96, 29,071.48 and 8,285.71

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Solution

The fourth proportional to 19,378.96, 29,071.48 and 8,285.71 is: 12,429.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,378.96 : 29,071.48 = 8,285.71 : x
  2. Step 2: Convert to fraction form
    19,378.96/29,071.48 = 8,285.71/x
  3. Step 3: Cross multiply
    19,378.96x = 29,071.48 × 8,285.71
  4. Step 4: Simplify right side
    19,378.96x = 240,877,707.19
  5. Step 5: Solve for x
    x = 240,877,707.19/19,378.96
  6. Step 6: Final answer
    x = 12,429.86

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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.