Home / 27,138.90-40,698.75-12,905.70

Finding the Fourth Proportional to 27,138.90, 40,698.75 and 12,905.70

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Solution

The fourth proportional to 27,138.90, 40,698.75 and 12,905.70 is: 19,353.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,138.90 : 40,698.75 = 12,905.70 : x
  2. Step 2: Convert to fraction form
    27,138.90/40,698.75 = 12,905.70/x
  3. Step 3: Cross multiply
    27,138.90x = 40,698.75 × 12,905.70
  4. Step 4: Simplify right side
    27,138.90x = 525,245,857.88
  5. Step 5: Solve for x
    x = 525,245,857.88/27,138.90
  6. Step 6: Final answer
    x = 19,353.98

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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.