Home / 12,278.06-18,420.18-4,880.06

Finding the Fourth Proportional to 12,278.06, 18,420.18 and 4,880.06

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Solution

The fourth proportional to 12,278.06, 18,420.18 and 4,880.06 is: 7,321.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.06 : 18,420.18 = 4,880.06 : x
  2. Step 2: Convert to fraction form
    12,278.06/18,420.18 = 4,880.06/x
  3. Step 3: Cross multiply
    12,278.06x = 18,420.18 × 4,880.06
  4. Step 4: Simplify right side
    12,278.06x = 89,891,583.61
  5. Step 5: Solve for x
    x = 89,891,583.61/12,278.06
  6. Step 6: Final answer
    x = 7,321.32

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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.