Home / 18,712.48-28,078.56-7,627.36

Finding the Fourth Proportional to 18,712.48, 28,078.56 and 7,627.36

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Solution

The fourth proportional to 18,712.48, 28,078.56 and 7,627.36 is: 11,445.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.48 : 28,078.56 = 7,627.36 : x
  2. Step 2: Convert to fraction form
    18,712.48/28,078.56 = 7,627.36/x
  3. Step 3: Cross multiply
    18,712.48x = 28,078.56 × 7,627.36
  4. Step 4: Simplify right side
    18,712.48x = 214,165,285.40
  5. Step 5: Solve for x
    x = 214,165,285.40/18,712.48
  6. Step 6: Final answer
    x = 11,445.05

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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.