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Finding the Fourth Proportional to 21,928.74, 32,911.95 and 8,790.14

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Solution

The fourth proportional to 21,928.74, 32,911.95 and 8,790.14 is: 13,192.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,928.74 : 32,911.95 = 8,790.14 : x
  2. Step 2: Convert to fraction form
    21,928.74/32,911.95 = 8,790.14/x
  3. Step 3: Cross multiply
    21,928.74x = 32,911.95 × 8,790.14
  4. Step 4: Simplify right side
    21,928.74x = 289,300,483.61
  5. Step 5: Solve for x
    x = 289,300,483.61/21,928.74
  6. Step 6: Final answer
    x = 13,192.75

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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.