Home / 18,685.90-28,039.65-7,000.30

Finding the Fourth Proportional to 18,685.90, 28,039.65 and 7,000.30

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Solution

The fourth proportional to 18,685.90, 28,039.65 and 7,000.30 is: 10,504.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,685.90 : 28,039.65 = 7,000.30 : x
  2. Step 2: Convert to fraction form
    18,685.90/28,039.65 = 7,000.30/x
  3. Step 3: Cross multiply
    18,685.90x = 28,039.65 × 7,000.30
  4. Step 4: Simplify right side
    18,685.90x = 196,285,961.90
  5. Step 5: Solve for x
    x = 196,285,961.90/18,685.90
  6. Step 6: Final answer
    x = 10,504.50

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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.