Home / 19,083.72-28,636.80-7,989.48

Finding the Fourth Proportional to 19,083.72, 28,636.80 and 7,989.48

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Solution

The fourth proportional to 19,083.72, 28,636.80 and 7,989.48 is: 11,988.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,083.72 : 28,636.80 = 7,989.48 : x
  2. Step 2: Convert to fraction form
    19,083.72/28,636.80 = 7,989.48/x
  3. Step 3: Cross multiply
    19,083.72x = 28,636.80 × 7,989.48
  4. Step 4: Simplify right side
    19,083.72x = 228,793,140.86
  5. Step 5: Solve for x
    x = 228,793,140.86/19,083.72
  6. Step 6: Final answer
    x = 11,988.92

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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.