Home / 18,985.90-28,481.93-7,140.60

Finding the Fourth Proportional to 18,985.90, 28,481.93 and 7,140.60

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Solution

The fourth proportional to 18,985.90, 28,481.93 and 7,140.60 is: 10,712.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,985.90 : 28,481.93 = 7,140.60 : x
  2. Step 2: Convert to fraction form
    18,985.90/28,481.93 = 7,140.60/x
  3. Step 3: Cross multiply
    18,985.90x = 28,481.93 × 7,140.60
  4. Step 4: Simplify right side
    18,985.90x = 203,378,069.36
  5. Step 5: Solve for x
    x = 203,378,069.36/18,985.90
  6. Step 6: Final answer
    x = 10,712.06

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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.