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Finding the Fourth Proportional to 18,940.80, 26,118.95 and 12,565.16

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Solution

The fourth proportional to 18,940.80, 26,118.95 and 12,565.16 is: 17,327.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,940.80 : 26,118.95 = 12,565.16 : x
  2. Step 2: Convert to fraction form
    18,940.80/26,118.95 = 12,565.16/x
  3. Step 3: Cross multiply
    18,940.80x = 26,118.95 × 12,565.16
  4. Step 4: Simplify right side
    18,940.80x = 328,188,785.78
  5. Step 5: Solve for x
    x = 328,188,785.78/18,940.80
  6. Step 6: Final answer
    x = 17,327.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.