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Finding the Fourth Proportional to 21,928.96, 32,900.50 and 7,888.86

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Solution

The fourth proportional to 21,928.96, 32,900.50 and 7,888.86 is: 11,835.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,928.96 : 32,900.50 = 7,888.86 : x
  2. Step 2: Convert to fraction form
    21,928.96/32,900.50 = 7,888.86/x
  3. Step 3: Cross multiply
    21,928.96x = 32,900.50 × 7,888.86
  4. Step 4: Simplify right side
    21,928.96x = 259,547,438.43
  5. Step 5: Solve for x
    x = 259,547,438.43/21,928.96
  6. Step 6: Final answer
    x = 11,835.83

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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.