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Finding the Fourth Proportional to 19,006.79, 28,510.20 and 5,155.79

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Solution

The fourth proportional to 19,006.79, 28,510.20 and 5,155.79 is: 7,733.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,006.79 : 28,510.20 = 5,155.79 : x
  2. Step 2: Convert to fraction form
    19,006.79/28,510.20 = 5,155.79/x
  3. Step 3: Cross multiply
    19,006.79x = 28,510.20 × 5,155.79
  4. Step 4: Simplify right side
    19,006.79x = 146,992,604.06
  5. Step 5: Solve for x
    x = 146,992,604.06/19,006.79
  6. Step 6: Final answer
    x = 7,733.69

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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.