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Finding the Fourth Proportional to 21,776.96, 32,671.78 and 6,985.56

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Solution

The fourth proportional to 21,776.96, 32,671.78 and 6,985.56 is: 10,480.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,776.96 : 32,671.78 = 6,985.56 : x
  2. Step 2: Convert to fraction form
    21,776.96/32,671.78 = 6,985.56/x
  3. Step 3: Cross multiply
    21,776.96x = 32,671.78 × 6,985.56
  4. Step 4: Simplify right side
    21,776.96x = 228,230,679.50
  5. Step 5: Solve for x
    x = 228,230,679.50/21,776.96
  6. Step 6: Final answer
    x = 10,480.37

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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.