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Finding the Fourth Proportional to 12,483.66, 18,728.19 and 3,719.28

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Solution

The fourth proportional to 12,483.66, 18,728.19 and 3,719.28 is: 5,579.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,483.66 : 18,728.19 = 3,719.28 : x
  2. Step 2: Convert to fraction form
    12,483.66/18,728.19 = 3,719.28/x
  3. Step 3: Cross multiply
    12,483.66x = 18,728.19 × 3,719.28
  4. Step 4: Simplify right side
    12,483.66x = 69,655,382.50
  5. Step 5: Solve for x
    x = 69,655,382.50/12,483.66
  6. Step 6: Final answer
    x = 5,579.72

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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.