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Finding the Fourth Proportional to 18,979.25, 26,187.91 and 13,331.25

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Solution

The fourth proportional to 18,979.25, 26,187.91 and 13,331.25 is: 18,394.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,979.25 : 26,187.91 = 13,331.25 : x
  2. Step 2: Convert to fraction form
    18,979.25/26,187.91 = 13,331.25/x
  3. Step 3: Cross multiply
    18,979.25x = 26,187.91 × 13,331.25
  4. Step 4: Simplify right side
    18,979.25x = 349,117,541.86
  5. Step 5: Solve for x
    x = 349,117,541.86/18,979.25
  6. Step 6: Final answer
    x = 18,394.70

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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.