Home / 12,387.44-18,580.95-4,991.72

Finding the Fourth Proportional to 12,387.44, 18,580.95 and 4,991.72

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Solution

The fourth proportional to 12,387.44, 18,580.95 and 4,991.72 is: 7,487.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.44 : 18,580.95 = 4,991.72 : x
  2. Step 2: Convert to fraction form
    12,387.44/18,580.95 = 4,991.72/x
  3. Step 3: Cross multiply
    12,387.44x = 18,580.95 × 4,991.72
  4. Step 4: Simplify right side
    12,387.44x = 92,750,899.73
  5. Step 5: Solve for x
    x = 92,750,899.73/12,387.44
  6. Step 6: Final answer
    x = 7,487.50

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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.