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Finding the Fourth Proportional to 12,478.93, 18,620.19 and 12,056.11

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Solution

The fourth proportional to 12,478.93, 18,620.19 and 12,056.11 is: 17,989.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.93 : 18,620.19 = 12,056.11 : x
  2. Step 2: Convert to fraction form
    12,478.93/18,620.19 = 12,056.11/x
  3. Step 3: Cross multiply
    12,478.93x = 18,620.19 × 12,056.11
  4. Step 4: Simplify right side
    12,478.93x = 224,487,058.86
  5. Step 5: Solve for x
    x = 224,487,058.86/12,478.93
  6. Step 6: Final answer
    x = 17,989.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.