Home / 12,124.78-18,155.48-11,385.74

Finding the Fourth Proportional to 12,124.78, 18,155.48 and 11,385.74

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Solution

The fourth proportional to 12,124.78, 18,155.48 and 11,385.74 is: 17,048.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,124.78 : 18,155.48 = 11,385.74 : x
  2. Step 2: Convert to fraction form
    12,124.78/18,155.48 = 11,385.74/x
  3. Step 3: Cross multiply
    12,124.78x = 18,155.48 × 11,385.74
  4. Step 4: Simplify right side
    12,124.78x = 206,713,563.32
  5. Step 5: Solve for x
    x = 206,713,563.32/12,124.78
  6. Step 6: Final answer
    x = 17,048.85

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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.