Home / 21,156.60-31,745.76-9,318.66

Finding the Fourth Proportional to 21,156.60, 31,745.76 and 9,318.66

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Solution

The fourth proportional to 21,156.60, 31,745.76 and 9,318.66 is: 13,982.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.60 : 31,745.76 = 9,318.66 : x
  2. Step 2: Convert to fraction form
    21,156.60/31,745.76 = 9,318.66/x
  3. Step 3: Cross multiply
    21,156.60x = 31,745.76 × 9,318.66
  4. Step 4: Simplify right side
    21,156.60x = 295,827,943.88
  5. Step 5: Solve for x
    x = 295,827,943.88/21,156.60
  6. Step 6: Final answer
    x = 13,982.77

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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.