Home / 20,690.06-31,029.60-9,000.50

Finding the Fourth Proportional to 20,690.06, 31,029.60 and 9,000.50

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Solution

The fourth proportional to 20,690.06, 31,029.60 and 9,000.50 is: 13,498.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.06 : 31,029.60 = 9,000.50 : x
  2. Step 2: Convert to fraction form
    20,690.06/31,029.60 = 9,000.50/x
  3. Step 3: Cross multiply
    20,690.06x = 31,029.60 × 9,000.50
  4. Step 4: Simplify right side
    20,690.06x = 279,281,914.80
  5. Step 5: Solve for x
    x = 279,281,914.80/20,690.06
  6. Step 6: Final answer
    x = 13,498.36

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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.