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Finding the Fourth Proportional to 15,641.96, 21,586.50 and 8,928.68

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Solution

The fourth proportional to 15,641.96, 21,586.50 and 8,928.68 is: 12,321.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,641.96 : 21,586.50 = 8,928.68 : x
  2. Step 2: Convert to fraction form
    15,641.96/21,586.50 = 8,928.68/x
  3. Step 3: Cross multiply
    15,641.96x = 21,586.50 × 8,928.68
  4. Step 4: Simplify right side
    15,641.96x = 192,738,950.82
  5. Step 5: Solve for x
    x = 192,738,950.82/15,641.96
  6. Step 6: Final answer
    x = 12,321.92

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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.