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Finding the Fourth Proportional to 18,869.16, 28,293.98 and 8,472.04

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Solution

The fourth proportional to 18,869.16, 28,293.98 and 8,472.04 is: 12,703.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869.16 : 28,293.98 = 8,472.04 : x
  2. Step 2: Convert to fraction form
    18,869.16/28,293.98 = 8,472.04/x
  3. Step 3: Cross multiply
    18,869.16x = 28,293.98 × 8,472.04
  4. Step 4: Simplify right side
    18,869.16x = 239,707,730.32
  5. Step 5: Solve for x
    x = 239,707,730.32/18,869.16
  6. Step 6: Final answer
    x = 12,703.68

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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.