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Finding the Fourth Proportional to 15,188.01, 20,956.08 and 8,815.68

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Solution

The fourth proportional to 15,188.01, 20,956.08 and 8,815.68 is: 12,163.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,188.01 : 20,956.08 = 8,815.68 : x
  2. Step 2: Convert to fraction form
    15,188.01/20,956.08 = 8,815.68/x
  3. Step 3: Cross multiply
    15,188.01x = 20,956.08 × 8,815.68
  4. Step 4: Simplify right side
    15,188.01x = 184,742,095.33
  5. Step 5: Solve for x
    x = 184,742,095.33/15,188.01
  6. Step 6: Final answer
    x = 12,163.68

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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.