Home / 11,223.80-16,821.30-9,985.40

Finding the Fourth Proportional to 11,223.80, 16,821.30 and 9,985.40

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Solution

The fourth proportional to 11,223.80, 16,821.30 and 9,985.40 is: 14,965.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,223.80 : 16,821.30 = 9,985.40 : x
  2. Step 2: Convert to fraction form
    11,223.80/16,821.30 = 9,985.40/x
  3. Step 3: Cross multiply
    11,223.80x = 16,821.30 × 9,985.40
  4. Step 4: Simplify right side
    11,223.80x = 167,967,409.02
  5. Step 5: Solve for x
    x = 167,967,409.02/11,223.80
  6. Step 6: Final answer
    x = 14,965.29

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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.