Home / 20,689.06-31,028.10-8,999.50

Finding the Fourth Proportional to 20,689.06, 31,028.10 and 8,999.50

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Solution

The fourth proportional to 20,689.06, 31,028.10 and 8,999.50 is: 13,496.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.06 : 31,028.10 = 8,999.50 : x
  2. Step 2: Convert to fraction form
    20,689.06/31,028.10 = 8,999.50/x
  3. Step 3: Cross multiply
    20,689.06x = 31,028.10 × 8,999.50
  4. Step 4: Simplify right side
    20,689.06x = 279,237,385.95
  5. Step 5: Solve for x
    x = 279,237,385.95/20,689.06
  6. Step 6: Final answer
    x = 13,496.86

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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.