Home / 18,985.29-28,478.70-7,137.83

Finding the Fourth Proportional to 18,985.29, 28,478.70 and 7,137.83

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Solution

The fourth proportional to 18,985.29, 28,478.70 and 7,137.83 is: 10,707.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,985.29 : 28,478.70 = 7,137.83 : x
  2. Step 2: Convert to fraction form
    18,985.29/28,478.70 = 7,137.83/x
  3. Step 3: Cross multiply
    18,985.29x = 28,478.70 × 7,137.83
  4. Step 4: Simplify right side
    18,985.29x = 203,275,976.83
  5. Step 5: Solve for x
    x = 203,275,976.83/18,985.29
  6. Step 6: Final answer
    x = 10,707.03

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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.