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Finding the Fourth Proportional to 19,005.57, 28,508.36 and 8,472.87

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Solution

The fourth proportional to 19,005.57, 28,508.36 and 8,472.87 is: 12,709.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,005.57 : 28,508.36 = 8,472.87 : x
  2. Step 2: Convert to fraction form
    19,005.57/28,508.36 = 8,472.87/x
  3. Step 3: Cross multiply
    19,005.57x = 28,508.36 × 8,472.87
  4. Step 4: Simplify right side
    19,005.57x = 241,547,585.83
  5. Step 5: Solve for x
    x = 241,547,585.83/19,005.57
  6. Step 6: Final answer
    x = 12,709.31

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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.