Home / 21,090.24-31,638.60-7,236

Finding the Fourth Proportional to 21,090.24, 31,638.60 and 7,236

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Solution

The fourth proportional to 21,090.24, 31,638.60 and 7,236 is: 10,855.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.24 : 31,638.60 = 7,236 : x
  2. Step 2: Convert to fraction form
    21,090.24/31,638.60 = 7,236/x
  3. Step 3: Cross multiply
    21,090.24x = 31,638.60 × 7,236
  4. Step 4: Simplify right side
    21,090.24x = 228,936,909.60
  5. Step 5: Solve for x
    x = 228,936,909.60/21,090.24
  6. Step 6: Final answer
    x = 10,855.11

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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.