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Finding the Fourth Proportional to 15,845.40, 21,866.76 and 8,771.67

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Solution

The fourth proportional to 15,845.40, 21,866.76 and 8,771.67 is: 12,104.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,845.40 : 21,866.76 = 8,771.67 : x
  2. Step 2: Convert to fraction form
    15,845.40/21,866.76 = 8,771.67/x
  3. Step 3: Cross multiply
    15,845.40x = 21,866.76 × 8,771.67
  4. Step 4: Simplify right side
    15,845.40x = 191,808,002.69
  5. Step 5: Solve for x
    x = 191,808,002.69/15,845.40
  6. Step 6: Final answer
    x = 12,104.96

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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.