Home / 12,478.42-18,718.38-3,712.60

Finding the Fourth Proportional to 12,478.42, 18,718.38 and 3,712.60

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Solution

The fourth proportional to 12,478.42, 18,718.38 and 3,712.60 is: 5,569.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.42 : 18,718.38 = 3,712.60 : x
  2. Step 2: Convert to fraction form
    12,478.42/18,718.38 = 3,712.60/x
  3. Step 3: Cross multiply
    12,478.42x = 18,718.38 × 3,712.60
  4. Step 4: Simplify right side
    12,478.42x = 69,493,857.59
  5. Step 5: Solve for x
    x = 69,493,857.59/12,478.42
  6. Step 6: Final answer
    x = 5,569.12

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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.