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Finding the Fourth Proportional to 19,005.96, 28,515.08 and 9,143.96

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Solution

The fourth proportional to 19,005.96, 28,515.08 and 9,143.96 is: 13,718.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,005.96 : 28,515.08 = 9,143.96 : x
  2. Step 2: Convert to fraction form
    19,005.96/28,515.08 = 9,143.96/x
  3. Step 3: Cross multiply
    19,005.96x = 28,515.08 × 9,143.96
  4. Step 4: Simplify right side
    19,005.96x = 260,740,750.92
  5. Step 5: Solve for x
    x = 260,740,750.92/19,005.96
  6. Step 6: Final answer
    x = 13,718.89

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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.