Home / 12,376.20-18,578.70-7,451.40

Finding the Fourth Proportional to 12,376.20, 18,578.70 and 7,451.40

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Solution

The fourth proportional to 12,376.20, 18,578.70 and 7,451.40 is: 11,185.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,376.20 : 18,578.70 = 7,451.40 : x
  2. Step 2: Convert to fraction form
    12,376.20/18,578.70 = 7,451.40/x
  3. Step 3: Cross multiply
    12,376.20x = 18,578.70 × 7,451.40
  4. Step 4: Simplify right side
    12,376.20x = 138,437,325.18
  5. Step 5: Solve for x
    x = 138,437,325.18/12,376.20
  6. Step 6: Final answer
    x = 11,185.77

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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.