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Finding the Fourth Proportional to 15,098.08, 20,835.20 and 8,815.68

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Solution

The fourth proportional to 15,098.08, 20,835.20 and 8,815.68 is: 12,165.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,098.08 : 20,835.20 = 8,815.68 : x
  2. Step 2: Convert to fraction form
    15,098.08/20,835.20 = 8,815.68/x
  3. Step 3: Cross multiply
    15,098.08x = 20,835.20 × 8,815.68
  4. Step 4: Simplify right side
    15,098.08x = 183,676,455.94
  5. Step 5: Solve for x
    x = 183,676,455.94/15,098.08
  6. Step 6: Final answer
    x = 12,165.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.