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Finding the Fourth Proportional to 10,661.34, 15,991.86 and 4,813.86

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Solution

The fourth proportional to 10,661.34, 15,991.86 and 4,813.86 is: 7,220.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,661.34 : 15,991.86 = 4,813.86 : x
  2. Step 2: Convert to fraction form
    10,661.34/15,991.86 = 4,813.86/x
  3. Step 3: Cross multiply
    10,661.34x = 15,991.86 × 4,813.86
  4. Step 4: Simplify right side
    10,661.34x = 76,982,575.18
  5. Step 5: Solve for x
    x = 76,982,575.18/10,661.34
  6. Step 6: Final answer
    x = 7,220.72

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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.